[Cho20] Cho et al., "0.00016 deg/sqrt(hr) Angle Random Walk (ARW) and 0.0014 deg/hr Bias Instability (BI) from a 5.2M-Q and 1-cm Precision Shell Integrating (PSI) Gyroscope", IEEE Inertial 2020.
Bio: Jae Yoong Cho is the CEO of Enertia Microsystems Inc. (San Leandro, CA). He received a Ph.D. degree in Electrical Engineering from the University of Michigan in 2012 (Advisor: Khalil Najafi). He was a postdoc (2012-2015) and an assistant research scientist (2015-2020) at the University of Michigan. In 2017, he co-founded Enertia Micro to commercialize the birdbath resonator gyroscope (BRG) technology, which he invented under the support of DARPA. His expertise includes design, fabrication, and control of high-performance MEMS inertial sensors.
]]>Bio: Suman Datta, Joseph M Pettit Chair Professor at Georgia Tech and a GRA Eminent Scholar, was previously Stinson Chair Professor of Electrical Engineering at the University of Notre Dame and Professor of Electrical Engineering at The Pennsylvania State University. From 1999 to 2007, he led device R&D at Intel Corporation, contributing to several generations of high-performance logic transistors. His research group focuses on electronic devices for novel compute models. A Fellow of the IEEE and NAI, Datta has published 445+ papers and holds 186 semiconductor related US patents.
View a live stream of the seminar
The National Science Foundation (NSF) is gearing up to unveil a major funding announcement in Fall 2024 to establish new Materials Research Science and Engineering Centers (MRSECs). These centers support interdisciplinary materials research and education addressing fundamental problems in science and engineering. MRSECs foster groundbreaking research and offer sustained support for university-based materials research.
We are launching an internal limited submission process and associated planning to provide ample time to put forth a competitive MRSEC pre-proposal in 2025. We expect to select two or three interdisciplinary research groups (IRGs) by Summer 2024, after initial selections in late Spring 2024.
The IMAT team is conducting a 90-minute workshop to discuss this funding opportunity, the internal selection process, the overall timeline, and more. The overarching goal of this workshop is to start the process of defining teams that we will lead the several interdisciplinary research groups. Please plan to attend and leave with key takeaways to win this major funding opportunity from NSF!
The session will be recorded for those that cannot attend. If you have questions about the session, please contact Martin Mourigal.
Online Webinar: https://tinyurl.com/4zce22rm (Meeting ID: 267 587 534 051 Passcode: nfqiCn)
]]>Email: h.ngo@dataphysics-instruments.com
]]>Abstract: The design space offered by additive manufacturing (AM) has provided new and exciting pathways for material development and optimization to solve long standing design and performance challenges. Contrasting from conventional subtractive manufacturing methods, AM enables complex design and spatial composition and microstructural grading. The impact of these advanced manufacturing capabilities is currently being explored at Sandia National Laboratories (SNL) to provide a flexible and agile solution to meet evolving and demanding national security needs. This talk highlights several recent AM R&D thrusts at Sandia to advance both the technology and capabilities. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525
Biography: Jonathan Pegues received his PhD in Mechanical Engineering from Auburn University utilizing additive manufacturing to fabricate fatigue resistant stainless steels capable of outperforming their wrought counterparts. During this time, he also served as a project engineer with the National Center for Additive Manufacturing Excellence (NCAME), working on several projects related to establishing process-structure-property relationships for additive manufactured metallic materials. He joined Sandia National Laboratories as a postdoctoral appointee in 2019 with the Coatings and Additive Manufacturing group, supporting materials development of high entropy alloys and refractory metals. In 2020 he converted to staff to support qualification activities for additive manufacturing processes. His research interest in additive manufacturing center on advancing the technology to design around long-standing materials failure challenges by optimizing the complex process-structure-property relationships.
]]>Location:
Room 114
Georgia Tech Manufacturing Institute
Callaway Manufacturing Research Center
813 Ferst Drive NW
Atlanta, GA 30332
Abstract:
Although contact electrification (triboelecrification) (CE) has been documented since 2600 years ago, its scientific understanding remains inconclusive, unclear and un-unified. This paper reviews the updated progress for studying the fundamental mechanism of CE using Kelvin probe force microscopy for solid-solid cases. Our conclusion is that electron transfer is the dominant mechanism for CE between solid-solid pairs. Electron transfer occurs only when the interatomic distance between the two materials is shorter than the normal bonding length (typically ~0.2 nm) in the region of repulsive forces. A strong electron cloud overlap (or wave function overlap) between the two atoms/molecules in the repulsive region leads to electron transition between the atoms/molecules, owing to the reduced interatomic potential barrier. The role played by contact/friction force is to induce strong overlap between the electron clouds (or wave function in physics, bonding in chemistry). The electrostatic charges on the surfaces can be released from the surface by electron thermionic emission and/or photon excitation, so these electrostatic charges may not remain on the surface if sample temperature is higher than ~300-400 0C.
The electron transfer model could be extended to liquid-solid, liquid-gas and even liquid-liquid cases. As for the liquid-solid case, molecules in the liquid would have electron cloud overlap with the atoms on the solid surface at the very first contact with a virginal solid surface, and electron transfer is required in order to create the first layer of electrostatic charges on the solid surface. This step only occurs for the very first contact of the liquid with the solid. Then, ion transfer is the second step and is the dominant process thereafter, which is a redistribution of the ions in solution considering electrostatic interactions with the charged solid surface. This is proposed as a two-step formation process of the electric double layer (EDL) at the liquid-solid interface.
The fundamental theory of the triboelectric nanogenerators (TENGs) is explored based on a group of reformulated Maxwell equations. In the Maxwell’s displacement current proposed in 1861, the term e¶E/¶t gives the birth of electromagnetic wave, which is the foundation of wireless communication, radar and later the information technology. Our study indicates that, owing to the presence of surface polarization charges present on the surfaces of the dielectric media in TENG, an additional term ¶Ps/¶t that is due to non-electric field induced polarization should be added in the Maxwell’s displacement current, which is the output electric current of the TENG. From a set of reformulated Maxwell equations, we derived the first principle theory of TENG.
Biography:
Dr. Zhong Lin (Z.L.) Wang received his Ph.D in Physics from Arizona State University in 1987. He is the Hightower Chair in Materials Science and Engineering, Regents' Professor, and College of Engineering Distinguished Professor at the Georgia Institute of Technology. He served as a Visiting Lecturer in SUNY (1987-1988), Stony Brook, as a research fellow at the Cavendish Laboratory in Cambridge (England) (1988-1989), Oak Ridge National Laboratory (1989-1993) and at National Institute of Standards and Technology (1993-1995) before joining Georgia Tech in 1995. He is the Hightower Chair in Materials Science and Engineering and Regents' Professor at Georgia Tech. He is also the founding director and director of the Beijing Institute of Nanoenergy and Nanosystems.
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Atom Probe Tomography (APT) is the highest special resolution analytical characterization technique with high efficiency single atom detection for quantitative atom scale 3D compositional analysis and elemental mapping of chemical heterogeneities. This talk will cover APT operational theory, an introduction to sample prep and data reconstruction, and an overview of various applications. A commercial cryo-UHV solution for FIB-APT specimen transfer will also be presented which expands the application space for APT to biological materials, hydrogen containing materials, and surfaces prone to rapid oxidation.
Robert M. Ulfig has played many roles at CAMECA (Imago) since 2001 and now works as a Product Manager for the atom probe products. Robert previously worked as a Sr. Process Engineer at Advanced Micro Devices sub-micron development center in Sunnyvale CA, and graduated from The University of Wisconsin-Madison with a BS in Nuclear Engineering (Reactor Operator at the department’s 1MWt nuclear reactor) and a Masters in Materials Science and Engineering.
Lunch provided with registration.
Click here to register.
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Abstract:
Applications for circuits and devices printed on flexible substrates abound, ranging from wearable diagnostic sensors to large area, roll-up displays. Continuous printing processes are attractive for manufacturing flexible electronics. However, two challenges typically arise in this pursuit: (1) creating small feature sizes, and (2) achieving registration of multiple functional layers. This presentation will cover our efforts to address these challenges using a new approach – Self-Aligned Capillarity-Assisted Lithography for Electronics (or SCALE). SCALE involves imprinting a multilevel open network of reservoirs, capillaries and device structures into a UV-curable coating deposited on a flexible substrate, delivering electronically functional inks into the reservoirs by inkjet printing, and using capillarity to selectively fill capillaries and device structures attached to the reservoirs. The single imprint step creates all the structural features needed in the devices and capillary flow creates self-aligned, multimaterial devices. To-date we have used SCALE to create conductive networks, resistors, capacitors, diodes and transistors. This presentation will show advances in device architecture and performance, and explore the key processing steps. Special attention will be given to the continuous roll-to-roll imprinting process, experiments and visualizations of liquid flow in open capillary channels, and unique flow control methods such as a microfluidic diode.
Biography:
Lorraine F. Francis is Professor of Chemical Engineering and Materials Science and currently holds the 3M Chair in Experiential Learning in the College of Science and Engineering at the University of Minnesota. She received a B.S. in Ceramic Engineering from Alfred University in 1985, and M.S. and Ph.D. in Ceramic Engineering from the University of Illinois in 1987 and 1990, respectively. She then joined the University of Minnesota. Professor Francis has research interests broadly in the area of materials processing, including coating and printing processes and microstructure development studies. She is also very involved in undergraduate education, including developing a project-based learning class for freshmen and authoring a textbook. Professor Francis has received several awards. In 2019, she was named College of Science and Engineering Distinguished Professor, and in 2014 she received the Horace T. Morse - University of Minnesota Alumni Association Award for Outstanding Contributions to Undergraduate Education.
Reception at 2:45 p.m. in the Howey Physics Atrium.
Click here for Professor Lorraine F. Francis' Research Group page
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Wrinkling instability of compressed stiff thin films bound to soft substrates has been studies for many years and the formation and evolution of wrinkles is well understood. Similar wrinkling instabilities also play important role in biology during the development of organs, such as brains and guts, and during the formation of bacterial biofilms grown on soft substrates. In recent years, the wrinkling instability has been exploited to create structures with tunable drag, wetting, adhesion, and to create a template for wire formation. While these studies successfully demonstrated the proofs of concepts, the quantitative understanding is still lacking, because very little is known about how wrinkled surfaces deform in response to interactions with environment. To address this issue, we investigated the linear response of wrinkled structures to external forces. By mapping the problem to the Landau theory of phase transitions, we demonstrated that the linear response to external forces diverges near the onset of wrinkling instability with the usual mean field exponent found in critical phenomena. Interactions with environment also dictate the morphology of wrinkled patterns in growing biological systems.
A discussion on the formation of wrinkling patterns in bacterial biofilms grown on agar substrates, which usually have radial stripe patterns near the outer edge and zigzag herringbone-like patterns in the core. The observed wrinkling patterns result from uneven stress distribution in the biofilm as a consequence form the depletion of slowly diffusing nutrients underneath the biofilm, which are required for the bacterial growth.
Click here for Professor Andrej Košmrlj's Research Group page.
]]>(404) 894-0993
]]>The VHX Series has depth of field that is 20 times greater than conventional optical microscopes. KEYENCE designs the lenses, cameras and graphic engine in-house, enabling observation with an optimal balance of depth and brightness. Even users can capture high resolution images with ease.
Key Features
This event is free, open to internal and external attendees, and will be applicable to those in electronics, materials, biomedical, and nanotechnology related/adjacent fields.
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Abstract:
It has been more than two decades since electrocaloric-based temperature lifts of the order of 20°C were first reported in the ceramic materials and more than a decade since equivalent lifts were observed in polymeric thin films. Yet, since that time, the demonstration of even a single high performance electrocaloric-based cooling module has not been realized. Indeed, only modest performance (<5°C total lift) has been achieved when such modules have been challenged against a temperature incline. Coefficients of performance (COP) have been either unreported or inconsequential. Conversely, theoretical models predict the potential for regenerative cooling with lifts in excess of 10°C at COPs of ~6. In this talk we examine the cause of the shortfall in module performance from a material perspective. We discuss: (1) The impact of performance parasitics. (2) Active area loss due to dielectric breakdown and local arcing. (3) Degraded performance due to stress concentration, clamping from the electrode metallization and cyclic fatigue. Solutions to film and electrode failures can potentially be found by using material engineering to improve electrical, mechanical, and thermal-caloric properties.
Biography:
Dr. Joseph Mantese is a Research Fellow at United Technologies Corporate Research Center, specializing in electronic/optical materials, components, sensors, and actuators for aerospace and commercial system platforms; with particular emphasis on embedded sensing in extreme environments using RF wireless interconnectivity for both signal and power. His work on embedded sensing is facilitated by additive manufacturing, MEMS, and semiconductor fabrication processes. Dr. Mantese’ current responsibilities also include: future sensor and functional material conception and development, multi-business unit strategic planning, portfolio development, and road mapping; new program and project initiatives; and business and government program development.
Prior to joining UTRC, Dr. Mantese was Department Head and Senior Fellow of Delphi Research Laboratories (Materials, Components, and Packaging) the central research laboratory responsible for developing advanced technologies for automotive systems, including those for: safety, entertainment, HVAC, connection systems, and emissions control. Before joining Delphi in 1999, Dr. Mantese was a member of General Motors Research and Development Laboratories where he was Section Leader of sensor development. Dr. Mantese is the recipient of an R&D 100 Award (1997) for the development of industrial scale plasma ion implantation, recognized by Wayne State University through its Socius Collegii Award (2004) for collaborative research with the school of engineering, is twice winner of General Motors’ Campbell Award (1990 and 1995) for scientific breakthroughs in materials science, an inductee and subsequent honoree of Delphi Corporation’s Hall of Fame (2000, 2004) for scientific research and creation of corporate intellectual property, and twice winner of UTRC’s (2010, 2018) Outstanding Achievement Award for his fundamental work related to multi-species chemical sensing and for electrocaloric based solid state cooling. His work has been cited over 5000 times.
In 2013 Dr. Mantese was inducted as Fellow into the Connecticut Academy of Science and Engineering. In 2015 he was named Fellow of the American Physical Society, and in 2017 he was named Fellow of the Materials Research Society. Dr. Mantese is the holder of 55 patents pertaining to electronic materials, sensors, MEMS, and components. He has presented numerous invited and contributed talks, is the author of over 100 peer reviewed papers, including a book on the fundamentals of graded ferroic materials, and three book chapters related to electronic materials, sensors, and devices.
Reception at 2:30 p.m. outside Room L-2.
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Abstract:
Detailed understanding of how conformational dynamics orchestrates function in allosteric regulation of recognition and catalysis at atomic resolution remains ambiguous. The three dimensional structure of protein is not always adequate to provide a complete understanding of protein function. We use atomistic molecular dynamics simulations to complement experiments to understand how protein conformational dynamics are coupled to allosteric function. We analyze multi-dimensional simulation trajectories by mapping key dynamical features within individual macrostates as residue-residue contacts.
In this talk, we will discuss computational studies and evolutionary analysis of members of a ubiquitous family of enzymes that regulate many sub-cellular processes. The effects of distal mutations and substrate binding are observed at locations far beyond the mutation and binding sites, implying their importance in allostery. The results provide insights into the general interplay between enzyme conformational dynamics and catalysis from an atomistic perspective that have implications for structure-based drug design and protein engineering.
]]>(404) 385-0797
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Abstract
Engineering interest in nanostructuered materials has been founded on the potential to improve a myriad of mechanical properties such as increased strength/hardness, while scientific interest stems from the alternative fundamental mechanisms that are operative. Compared to their coarser-grained counterparts, the influence of interfaces (i.e., grain boundaries) becomes more significant in nanostructured materials. Current simulation techniques for understanding the mechanics in nanocrystalline alloys rely on non-physical microstructures, first-order grain boundary descriptors that poorly capture the complexity of interfacial structure-property relationships, and a lack of quantitative approaches that can accurately capture the specific contribution of different deformation mechanisms. In this study, we propose utilizing higher-order descriptors to improve our understanding of interfacial-driven strengthening and stability. These descriptors then aid in our boundary network modeling to understand larger-scale polycrystalline behavior by unraveling the complexity surrounding the competition/cooperation between different deformation mechanisms, as a function of grain size. The contribution of interfaces and dislocation-mediated deformation to the total strain in the material is resolved via continuum-based kinematic metrics, while the importance of choosing physically-based atomistic microstructures and proper equilibration techniques is shown. By unraveling the mechanistic origins of strengthening and stability in nanostructured materials, we demonstrate how such a fundamental understanding might be leveraged for future inverse materials design strategies.
Biography
Professor Tucker joined the Mechanical Engineering Department at Mines in the summer of 2017 as an Assistant Professor and is active in the interdisciplinary Materials Science program. Before joining the faculty at Mines, he spent 4 years as an Assistant Professor in the Department of Materials Science and Engineering at Drexel University (Philadelphia, PA), and 2 years as a Postdoctoral Research Appointee at Sandia National Laboratories (Albuquerque, NM) in the Computational Materials and Data Science group. While at Drexel, he was awarded the Outstanding Teacher Award in 2015 and the TMS Young Leader Professional Development Award in 2016. Professor Tucker earned his Ph.D. in 2011 from the Georgia Institute of Technology (School of Materials Science and Engineering), and a B.S. in 2004 from Westminster College (Salt Lake City, UT) majoring in both Physics and Mathematics. His research ambitions are aimed at integrating high-performance computing, materials theory, and novel computational tools to discover the fundamental structure-property relationships of emerging materials that will enable the predictive design of advanced materials with tunable properties.
Refreshments will be served.
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Abstract:
3D printing of metals has advanced rapidly in the past decade and is used across a wide range of industry. Many aspects of the technology are considered to be well understood in the sense that validated computer simulations are available. At the microscopic scale, however, more work is required to quantify and understand defect structures, which affect fatigue resistance, for example. Synchrotron-based 3D X-ray computed microtomography (µXCT) was performed at the Advanced Photon Source on a variety of AM samples using both laser (SLM) and electron beam (EBM) powder bed; this showed systematic trends in porosity. Optical and SEM characterization of powders used in additively manufacturing (AM) reveals a variety of morphologies and size distributions. Computer vision (CV), as a subset of machine learning, has been successfully applied to classify different microstructures, including powders. The power of CV is further demonstrated by application to detecting and classifying defects in the spreading in powder bed machines, where the defects often correspond to deficiencies in the printed part. In addition to the printed material, a wide range of powders were measured and invariably exhibited porosity to varying degrees. Outside of incomplete melting and keyholing, porosity in printed parts is inherited from pores or bubbles in the powder. This explanation is reinforced by evidence from simulation and from dynamic x-ray radiography (DXR), also conducted at the APS. DXR has revealed a wide range of phenomena, including void entrapment (from powder particles), keyholes (i.e., vapor holes) and hot cracking. Keyhole depth is linearly related to the excess power over a vaporization threshold. Concurrent diffraction provides information on solidification and phase transformation in, e.g., Ti-6Al-4V and stainless steel. High Energy (x-ray) Diffraction Microscopy (HEDM) experiments are also described that provide data on 3D microstructure and local elastic strain in 3D printed materials, including Ti-6Al-4V and Ti-7Al. The reconstruction of 3D microstructure in Ti-6Al-4V is challenging because of the fine, two-phase lamellar microstructure and the residual stress in the as-built condition. Both the majority hexagonal phase and the minority bcc phase were reconstructed.
Biography:
I have been a member of the faculty at Carnegie Mellon University since 1995. I am also the Co-Director of the newly formed NextManufacturing Center on additive manufacturing. Previously, I worked for the University of California at the Los Alamos National Laboratory. I spent ten years in management with five years as a Group Leader (and then Deputy Division Director) at Los Alamos, followed by five years as Department Head at CMU (up to 2000). I have been a Fellow of ASM since 1996, Fellow of the Institute of Physics (UK) since 2004 and was chosen to be a Fellow of TMS in 2011. I received the Cyril Stanley Smith Award from TMS in 2014, was elected as Member of Honor by the French Metallurgical Society in 2015 and then became the US Steel Professor of Metallurgical Engineering and Materials Science in 2017. My research group has about ten students and is supported by various Federal agencies, as well as companies such as Boeing and Northrop-Grumman. The focus of my research is on additive manufacturing, the measurement and prediction of microstructural evolution, the relationship between microstructure and properties, with a particular emphasis on three-dimensional effects, texture & anisotropy and the use of synchrotron x-rays.
Reception at 2:30 p.m. outside room L-2.
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Interested Faculty, Researchers and Graduate Students, please RSVP your attendance here: REGISTER
Sandia National Laboratories has partnered with Georgia Tech on the Sandia Academic Alliance Program. Sandia Day invites Georgia Tech faculty, researchers and graduate students for a half-day event to raise awareness about the academic alliance between GT and Sandia and exchange information about technical focus areas to develop new engagements. Academic partnerships enrich mutual capabilities and expand impact.
Intended Outcomes
Sandia Technical Themes
Abstract:
Most electrochemical technologies that operate under ambient conditions require ion-conducting polymer electrolytes. These polymers are passive in that electric bias drives ion migration in the thermodynamically favored direction. Recently, my group engineered two important features into passive ion-selective polymers to introduce the active function of photovoltaic action and demonstration of an ionic solar cell. These features were covalent bonding of photoacid dyes to the polymers such that absorption of visible light resulted in liberation of protons, and synthesis of polymer membranes with charge-selective contacts to facilitate separation and collection of H+ and OH–. Light excitation from either side of the polymer membranes resulted in H+ dissociation followed by directional charge collection. The charge collection direction was dictated by the electrostatic asymmetry in the polymers, which was formed due to an external pH difference setup across the membrane.
Joining a monopolar cation-selective polymer to a monopolar anion-selective polymer forms a bipolar membrane, which mimics a rectifying semiconductor pn-junction diode in form and function, and is able to maintain pH differences across it. Using a photoacid-dye-modified bipolar membrane, we measured a photovoltage of ~120 mV under conditions of solar-simulated excitation. In addition to more traditional electrochemical techniques, insights into materials function were obtained using finite-element numerical modeling of photoacid kinetics and membrane physics; beam-line x-ray scattering measurements; electrochemical impedance, solid-state NMR, and pulsed-laser spectroscopies; and fluorescence, electron, and force microscopies. Collectively, these photo-responsive polymers represent a new class of functional materials that use light to trigger changes in local ion concentration and electrostatic potential. These local changes can be used to affect macroscopic processes such as direct sunlight-driven redox chemistry or desalination of salt water, chemical catalysis, and triggering of cellular processes.
Biography:
Shane obtained a B.S. Degree in Mathematics, with a minor in Computer Programming, from Towson University and subsequently worked as a software engineer, community college instructor, and high school teacher prior to attending graduate school. Shane obtained an M.S. Degree in Nutrition from the University of Maryland, College Park followed by M.A. and Ph.D. Degrees in Photo-Physical Inorganic Chemistry from the Johns Hopkins University, where he worked for Prof. Jerry Meyer. He then worked for Prof. Nate Lewis as a DOE-EERE Postdoctoral Research Awardee at the California Institute of Technology until 2013. Since that time, Shane has been an Assistant Professor at the University of California, Irvine in the Department of Chemistry and holds a joint appointment in the Department of Chemical Engineering and Materials Science. He leads the Ardo Group for Molecular-Level Engineering of Functional Materials, which designs, synthesizes, and characterizes molecule–materials hybrids and aims to understand and control reaction mechanisms at asymmetric interfaces with the goal of optimizing energy conversion for practical applications, including solar seawater desalination, solar fuels devices, photovoltaics, fuel cells, and batteries. In 2016, Shane was named one of five inaugural Moore Inventor Fellows. He is also a recipient of a DOE Early Career Research Award and a Beall Innovation Award, and was named a Sloan Research Fellow, a Cottrell Scholar, a Kavli Fellow, and a Scialog Fellow. Shane has given over 100 invited talks, including at the National Academy of Sciences Distinctive Voices Lecture Series, the 2017 Resnick Institute Young Investigators Symposium, and Apple’s Membrane R&D Division. His research group is also supported by funding from the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy, the U.S. National Science Foundation’s Chemical Catalysis Program, Nissan Chemical Industries Ltd., and collaborative projects funded by University of California MEXUS–CONACYT and Research Corporation for Science Advancement.
Reception at 3:30 p.m. in the Georgia Tech Manufacturing Institute Atrium
Ardo Research Group -- UC Irvine
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Abstract
Thermodynamics provides a robust conceptual framework and set of laws that govern the exchange of energy and matter. Although these laws were originally articulated for macroscopic objects, it is hard to deny that nanoscale systems, as well, often exhibit “thermodynamic-like” behavior. To what extent can the venerable laws of thermodynamics be scaled down to apply to individual microscopic systems, and what new features emerge at the nanoscale? I will review recent progress toward answering these questions, with a focus on the second law of thermodynamics. I will argue that the inequalities ordinarily used to express the second law can be replaced by stronger equalities, known as fluctuation relations, which relate equilibrium properties to far-from-equilibrium fluctuations. The discovery and experimental validation of these relations has stimulated interest in the feedback control of small systems, the closely related Maxwell demon paradox, and the interpretation of the thermodynamic arrow of time. These developments have led to new tools for the analysis of non-equilibrium experiments and simulations, and they have refined our understanding of irreversibility and the second law.
Biography
Chris Jarzynski received an AB degree in physics from Princeton University in 1987, and a PhD in physics from the University of California, Berkeley in 1994. After postdoctoral positions at the University of Washington in Seattle and at Los Alamos National Laboratory in New Mexico, he became a staff member in the Theoretical Division at Los Alamos. In 2006, he moved to the University of Maryland, College Park, where he is now a Distinguished University Professor in the Department of Chemistry and Biochemistry, with joint appointments in the Institute for Physical Science and Technology and the Department of Physics. His research is primarily in the area of nonequilibrium statistical physics, where he has contributed to an understanding of how the laws of thermodynamics apply to nanoscale systems. He has been the recipient of a Fulbright Fellowship, the 2005 Sackler Prize in the Physical Sciences, and the 2019 Lars Onsager Prize in Theoretical Statistical Physics. He is a Fellow of the American Physical Society and the American Academy of Arts and Sciences.
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Abstract:
Strong Coulomb interactions in single-layer transition metal dichalcogenides (TMDs) result in the emergence of strongly bound excitons. These excitons and excitonic complexes, trions or biexcitons, for example, possess the valley degree of freedom and can be either optically bright or dark, depending on the spin configuration of the conduction and valence bands. In this talk, I will review our recent efforts on probing and controlling excitons in monolayer MoSe2 and WSe2 TMDs with high magnetic fields.
By employing high-field optical magneto-spectroscopy under strong out-of-plane magnetic fields and as a function of doping level, we can identify different exciton species and deduce their valley origins and binding energies. When a strong magnetic field is applied parallel to the 2D plane, it can be used to tilt and mix the CB spin component of excitons, which allows us to brighten and probe directly otherwise optically dark excitons. All of these effects vary with an applied gate voltage. It appears that proximity to graphene induces a charge transfer to RuCl3 that is sensitive to and perhaps controllable by an external voltage.
]]>Rates: *Rates include lunches on all days*
Georgia Tech Rate: $150
Academic and Government Rate: $250
Industry Rate: $500
Day1 – Photoelectron Spectroscopy:
08:30 – Registration starts
09:00: Introduction and Scope of Short Course – Prof. F. Alamgir
Morning session including the following activities:
12:00 – 13:00: Lunch break
Afternoon session include the following activities:
15:10 – 16:00: General comments: Open question and answer session
Day2 – Time of Flight SIMS:
09:00 – Breakfast starts
09:30: Introduction– Prof. F. Alamgir
Morning session including the following activities:
11:30 – 13:00: Lunch break
Afternoon session including the following activities:
16:00: Closing comments
REGISTER FOR THE COURSE AT THIS LINK
]]>Dr. Walter Henderson
Georgia Tech Institute for Electronics and Nanotechnology
404-894-4702
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Abstract:
Materials engineering – the precise deposition, removal, modification and measurement of materials at the atomic level – has enabled innovations in the Electronics, Display and Energy industries, and led to transformative changes across the globe, dramatically improving the quality of life and creating exciting global industries.
In the next 50 years, we will see even more radical innovation as we bring together the digital and physical worlds through materials engineering. This will enable next-generation integrated circuits, displays and advanced sensors, while simultaneously laying the foundation for revolutions in Artificial Intelligence, AR/VR, Transportation, Digital Manufacturing and Healthcare.
This presentation would detail the role of materials engineering technologies in creating a world of abundance by addressing critical problems in AR/VR, Artificial Intelligence, Big Data, Transportation, Digital Manufacturing and Healthcare – through technological creativity, entrepreneurship, open innovation and partnerships across the ecosystems.
Biography:
Dr. Omkaram (Om) Nalamasu is Senior Vice President and Chief Technology Officer (CTO) of Applied Materials, Inc. and President of Applied Ventures, LLC, the venture capital fund of Applied Materials, where he oversees investments in early- and growth-stage companies.
A world-renowned expert in lithographic materials and one of the semiconductor industry’s foremost forward-thinkers, Dr. Nalamasu has championed a renewed focus on Applied’ s global innovation culture through various internal development programs and open innovation methods. He has developed strategic relationships with universities, government organizations and research institutes around the world.
Dr. Nalamasu joined Applied in 2006 after serving as an NYSTAR Distinguished Professor of materials science and engineering at Rensselaer Polytechnic Institute, where he also served as vice president of research. He has held key research and development leadership positions at AT&T Bell Laboratories, Bell Laboratories/Lucent Technologies, and Agere Systems, Inc. He has received numerous awards, authored more than 180 papers, review articles and books, and holds more than 120 worldwide issued patents. He is a member of the Singapore’s A*STAR (Agency for Science, Technology and Research) Board of Directors, Singapore’s International Advisory Panel for Advanced Manufacturing and Engineering, and the board of directors of The Tech Museum in San Jose, California., Dr. Nalamasu was elected to the U.S. National Academy of Engineering. He received his Ph.D. from the University of British Columbia, Vancouver, Canada.
Reception at 3:30 p.m. in the Georgia Tech Manufacturing Institute Atrium
]]>Abstract:
Chromatin accessibility is a powerful lens to explore mechanisms of gene expression regulation, as regions of increased chromatin accessibility represent genetic elements that have the potential to regulate gene expression. To define the open chromatin landscape in primary human tissue, we collected single-cell chromatin accessibility profiles across 10 populations of immunophenotypically defined human hematopoietic cell types and constructed a chromatin accessibility landscape of human hematopoiesis to characterize differentiation trajectories. We find variation consistent with lineage bias toward different developmental branches in multipotent cell types. We observe heterogeneity within common myeloid progenitors (CMPs) and granulocyte-macrophage progenitors (GMPs) and develop a strategy to partition GMPs along their differentiation trajectory.
Furthermore, we integrated single-cell RNA sequencing (scRNA-seq) data to associate transcription factors to chromatin accessibility changes and regulatory elements to target genes through correlations of expression and regulatory element accessibility. Overall, this work provides a framework for integrative exploration of complex regulatory dynamics in a primary human tissue at single-cell resolution. We have also recently completed a survey of the chromatin accessibility landscape in primary human tumor tissue, providing a catalog of regulatory elements across human cancers.
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Abstract:
Building functional nanostructures with atomic level precision requires a detailed understanding of materials growth and the physics of self-assembly at the nanoscale. In situ imaging in the transmission electron microscope can provide unique information by measuring individual nanostructures while they grow. Here we describe examples in which in situ electron microscopy helps explore growth mechanisms and suggests strategies to build new types of structure, such as nanocrystals on graphene, electrochemically deposited nanostructures and catalytically grown semiconductor nanowires. We conclude with a perspective on the exciting recent advances in electron microscopy and how these developments will impact in situ experiments in the future.
Biography:
Frances M. Ross received her B.A. in Physics and Ph.D. in Materials Science from Cambridge University. Her postdoc was at A.T.&T. Bell Laboratories, using in situ electron microscopy to study silicon oxidation and dislocation dynamics. She joined the National Center for Electron Microscopy, Lawrence Berkeley National Laboratory, where she imaged anodic etching of Si. She then moved to the IBM T. J. Watson Research Center where she focused on crystal growth in a microscope with deposition and focused ion beam capabilities and developed liquid cell microscopy to image electrochemical processes. She recently joined the faculty at the Department of Materials Science and Engineering at MIT. Her interests include nanostructure self-assembly, liquid cell microscopy, epitaxy and electrochemical processes. She has been a Visiting Scientist at Lund University and an Adjunct Professor at Arizona State University. She received the UK Institute of Physics Boys Medal, the MSA Burton Medal and MRS Outstanding Young Investigator and Innovation in Materials Characterization Awards, holds an Honorary Doctorate from Lund, and is a Fellow of APS, AAAS, MRS, MSA, RMS and AVS.
Faculty profile page of Frances M. Ross.
Reception at 5:30 p.m. in the Marcus Nanotechnology Building Atrium
]]>404-894-1746
]]>Joseph Homer Saleh, Associate Professor
Aerospace Engineering, Georgia Tech
Abstract:
The best technology transfer mode comes “wearing shoes”; by educating and engaging students in the multidisciplinary issues of accident causation, injury prevention, and system safety, educators can provide them with a proper safety competence, accident awareness, and safety culture before they enter the workforce. In so doing, they can contribute one small step towards reducing the burden of injury, whether on campus, in the workplace, during commute, or at home.
In this talk, I will first argue that all engineering students should be safety-literate. I discuss why accident literacy and safety competence ought to be an essential part of their intellectual toolkit. I describe the elements of this safety literacy including some fundamental failure mechanisms and safety principles, which are domain-independent and broadly applicable across different contexts and industries. I will then share some thoughts on developing and teaching a course at Georgia Tech entitled, “Accident Causation and System Safety—AE 4357”. Although the course is based in the school of Aerospace Engineering, it is open to all students across campus, and it provides opportunities to examine accidents in different industries, e.g., oil and gas, nuclear, aerospace, and mining. This is an active learning course with little traditional lecturing. There are student-led presentations and discussions moderated (then key lessons synthesized) by the instructor. The students engage with and reflect on accident investigations reports, published articles, and other material. The case studies provided invite a deep reflection on the underlying failure mechanisms, their generalizability, and the various safety levers for accident prevention. The course is designed to go backward in the causal chain of adverse events, from applications and accidents having occurred, to safety principles and accident precursors, then further back to methods in risk assessment and safety culture. One of the key objectives of the course is to enrich the students’ understanding of causality (temporal depth, diversity of agency, coordinability) and to expand their scope of options and decision space for accident prevention. I will highlight some of the key ideas examined in this course, which are useful to the different communities that deal with safety issues and accident prevention.
Finally, I will discuss the development of a safety culture survey for college students and will provide preliminary results from a pilot study. The objectives of the survey were to develop a credible instrument for gauging safety culture(s) on campuses, to identify whether there are differences across engineering majors (and other covariates), and to help inform and guide safety education where most effective.
Biography:
Dr. Saleh is an Associate Professor in the School of Aerospace Engineering at the Georgia Institute of Technology. He received his undergraduate degree from Supaero (now ISAE) in Toulouse, France, a Masters degree from Harvard University, and a PhD from the Department of Aeronautics and Astronautics at MIT. Prior to Joining Georgia Tech, Dr. Saleh served as the Executive Director of the Ford-MIT Alliance, a multi-million dollar research partnership between MIT and the Ford Motor Company. He served as an Associate Editor of the journal Reliability Engineering and System Safety, and the IEEE Transactions on Aerospace and Electronic Systems. Dr. Saleh is the author two books, 140 technical publications, including two articles in the Encyclopedia of Aerospace Engineering (Wiley), and 70 journal articles, a dozen of which have been on the Top 25 most downloaded publications on ScienceDirect. He is an Associate Fellow of the American Institute of Aeronautics and Astronautics (AIAA) and a Senior Member of the Institute of Electrical and Electronics Engineers (IEEE). Dr. Saleh has received several awards for his teaching and mentoring at Georgia Tech, including the Outstanding Faculty Award (School of Aerospace Engineering), the Lockheed Dean’s Excellence in Teaching Award (college of Engineering), the Most Valuable Professor Award, and the Class of 1940 W. Roanne Beard Outstanding Teaching Award, Georgia Tech’s highest teaching award; and at MIT he received the Vicki Kerrebrock Award and two mentoring awards for supervising the Best Masters Thesis (for Nicole Jordan and Juan Pablo Torres Padilla). His research cover three broad themes: (1) spacecraft reliability and multi-state failure analysis; (2) analytical systems engineering as it pertains to space systems, focusing on its temporal dimension, including flexibility, obsolescence, space responsiveness, and schedule risk; and (3) accident causation and system safety. This is both a most meaningful and highly multidisciplinary theme, with focus areas across different contexts and industries. His research in this area includes a fundamental research component, an applied industry-specific component, and an educational component.
http://www.josephhomersaleh.com/site/
Reception at 3:30 p.m. in the Georgia Tech Manufacuring Institute Atrium
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Abstract:
A-RuCl3 is a layered antiferromagnetic Mott insulator that is believed to host a Kitaev quantum spin liquid, and notably there has been a claim for non-Abelian transport seen in a quantized thermal Hall conductance experiment. Seeking a means to access this physics by electronic means, we have begun exploring this material by exfoliation a la graphene. In particular, we have incorporated RuCl3 flakes into so-called van der Waals heterostructures.
While the electrical conductivity of RuCl3 alone is seen to drop like a rock with decreasing temperature, when placed in close proximity to monolayer graphene we observe an anomalously high conductivity through the combined system. Moreover, we find evidence of multiband transport and clear signatures of a 'critical resistivity' due to electron scattering by spin fluctuations near a magnetic phase transition. All of these effects vary with an applied gate voltage. It appears that proximity to graphene induces a charge transfer to RuCl3 that is sensitive to and perhaps controllable by an external voltage.
]]>(404) 385-3906
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1) Perovskite Solar Cells that use Iodine
AGENDA
8:30 AM-9:00AM Continental breakfast
9:00 AM-10:00 AM SQM (problem statement & past work)
10:00 AM-11:00 AM GT (past work & future efforts)
11:00 AM-12:00 AM Roundtable discussions & future program scoping
12:00 PM- 1:00 PM Complimentary lunch
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404-407-6036
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Abstract:
Controlled spalling of single-crystal semiconductors is an emerging technique which results in the rapid exfoliation of a thin, single-crystal layer by propagating fracture parallel to the wafer surface. Spalling fracture has been engineered to controllably and intentionally exfoliate thin film electronic devices from single-crystal semiconductors for the purposes of creating flexible devices or enabling substrate reuse to mitigate costs. The process uses an adhered stressor layer combined with an externally applied mechanical force to initiate and propagate a lateral fracture parallel to the substrate surface. Devices have been successfully removed from silicon, gallium arsenide, germanium, and gallium nitride substrates using this method. In this talk, examples will be drawn mainly from spalling (100)-oriented Ge and GaAs to illustrate the impact of cleavage system alignment on the resulting fracture morphology and spalling conditions. The spontaneous spalling model of Suo & Hutchinson has been used to model behavior in these systems, approximating spall depth and critical spalling conditions reasonably well. Fractography is used to understand morphological defects in spalled surfaces. Finally, we show that the fracture process does not generate extended defects that inhibit quality regrowth or degrade delaminated cell efficiency.
Biography:
Dr. Packard is an Associate Professor in the George S. Ansell Metallurgical and Materials Engineering Department at the Colorado School of Mines and holds a joint appointment at the National Renewable Energy Laboratory (NREL) in the National Center for Photovoltaics. She is the co-director of the International Center for Multiscale Characterization, a network of experts and state- of-the-art instruments at Mines and NREL that enable materials characterization and cross-correlation with functional properties and performance from the atomic- to macro-scales. Prior to appointment at Mines, Packard earned her Ph.D. in Materials Science & Engineering from MIT. Her research program applies experimental techniques commonly used to characterize mechanical behavior and properties in structural materials to solve problems in ceramics in predominantly energy-related applications. She has focused on elucidating the principles and mechanisms of deformation behavior in ceramics at the micro- and nano-scales. In 2014, she received a National Science Foundation Faculty Early Career Development (CAREER) Award and was selected as a TMS Young Leader. In 2017, she received the AIME Robert Lansing Hardy Award. To date, she has more than 35 archival publications, 3 issued patents, and has given over 40 invited and contributed talks. She is currently on sabbatical at CoorsTek Research & Development.
Reception at 3:30 p.m. in the Georgia Tech Manufacturing Institute Atrium.
The Packard Research Group profile page.
]]>The workshop is organized and hosted by the Renewable Bioproducts Institute and all sessions will be held at the Paper Tricentennial Building.
We will welcome leadership from Lanzatech, Algenol and Eastman Chemical Company during the morning sessions, followed by an afternoon of break-outs and insights into the latest research being conducted by Georgia Tech's Lignin Group, a collaboration made up of both students and faculty developing cost-efficient and ecologically sustainable processes from lignin to defined chemical compounds.
Lunch will be served, followed by an interactive poster session with graduate student researchers engaged in this space. For more details, including the latest agenda, please visit our Emerging Pathways workshop website.
If you have any questions or need additional information, please contact Dione Morton via email dione.morton@rbi.gatech.edu or by phone at 404.894.9550.
If you require hotel accommodations while in Atlanta, we have secured a preferred rate at the Renaissance Hotel-Midtown Atlanta. Reservations may be made here. The deadline to receive this rate is Sept. 18.
All parking on site at RBI is metered and can be paid online through the Park Mobile app for iPhone and Android.
Abstract:
This talk will present multidisciplinary work from material composites and robotics. We have created new types of actuators, sensors, displays, and additive manufacturing techniques for soft robots and haptic interfaces. For example, we now use stretchable optical waveguides as sensors for high accuracy, repeatability, and material compatibility with soft actuators. For displaying information, we have created stretchable, elastomeric light emitting displays as well as texture morphing skins for soft robots. We have created a new type of soft actuator based on molding of foams, and stereolithography printing of elastomer based soft robots, and implemented deep learning in stretchable membranes for interpreting touch. All of these technologies depend on the iterative and complex feedback between material and mechanical design. I will describe this process, what is the present state of the art, and future opportunities for science in the space of additive manufacturing of elastomeric robots.
Biography:
Rob Shepherd is an associate professor at Cornell University’s Organic Robotics Lab (ORL), which focuses on using synthetic adaptation of natural physiology to improve machine function and autonomy. Our research spans three primary areas: bioinspired robotics, haptic interfaces, soft sensors and displays, and advanced manufacturing. We use soft materials, mechanical design, and novel fabrication methods to replicate sensory organs such as dermal papillae, replicate organs that rely on actuation such as the heart, and to power soft actuators and robots. He is the recent recipient of an Air Force Office of Scientific Research Young Investigator Award, and an Office of Naval Research Young Investigator Award. His work has been featured in popular media outlets such as the BBC, Discovery Channel, and PBS’s NOVA science documentary series.
Reception at 3:30 p.m. in the Georgia Tech Manufacturing Instutite Atrium
The Organic Robotics Lab (ORL) profile page.
]]>Reception at 3:30 p.m. in the Georgia Tech Manufacturing Institute Atrium
Abstract:
The Savannah River Site in Aiken, SC was constructed in the 1950’s to produce the basic materials necessary in the fabrication of nuclear weapons, primarily tritium and plutonium-239. Five reactors were also built in an effort to produce these materials for our nation’s defense programs. In support of these efforts, the Savannah River Laboratory was created. In 2004, the lab became Savannah River National Laboratory and has three main focus areas: National Security, Environmental Stewardship, and Clean Energy. This presentation will discuss the history of the Savannah River Site, the role of the Savannah River National Laboratory in the safety and security of the nation, the immobilization of legacy nuclear waste, and some of the materials failures that occurred during nuclear waste processing.
Biography:
Biographical Information: Marissa Reigel Burnett joined Savannah River National Laboratory in 2009 after receiving her doctorate in Metallurgical and Materials Engineering from the Colorado School of Mines. Currently, she the manager for the Materials Applications and Process Technology (MA&PT) Group which specializes in metallurgy and materials science, nuclear material management, aging materials, and nuclear radiation modeling. Prior to becoming a manger, her research focused on the processing and immobilization of legacy nuclear waste, including the formulation and properties of radioactive waste forms, erosion/corrosion design basis, material compatibility analyses and project management. In 2015, Marissa was selected as a recipient of the SRNL Laboratory Director’s Award for Early Career Exceptional Achievement for her work on erosion-corrosion issues at the Hanford Site in Washington State. She is an active member of the American Ceramics Society and ASM International.
Marissa Reigel's LinkedIn page.
]]>Dr. Ronald E. Mickens, Distinguished Fuller E. Callaway Professor
Clark Atlanta University
Abstract:
NSFD schemes are based on a methodology not centered on the a priori satisfaction of particular mathematical requirements. A central and critical feature is that the discretization equations be dynamical consistent with the differential equations with regard to specific properties of the (physical) original system. Major consequences include modification of the step-size function and the non-local discrete representations of function. The general procedures will be illustrated by means of several explicit examples.
Biographical Summary
Ronald Elbert Mickens received his BA degree in physics from Fisk University (1964) and a Ph.D. in theoretical physics from Vanderbilt University (1968). He held postdoctoral positions at the MIT Center for Theoretical Physics (1968-70), Vanderbilt University (1980-81), and the Joint Institute for Laboratory Astrophysics (1981-82). He was professor of physics at Fisk University from 1970 – 1981. Presently, he is the Distinguished Fuller E. Callaway Professor at Clark Atlanta University. His current research interests include nonlinear oscillations, asymptotic methods for difference and differential equations, numerical integration of differential equations, the mathematical modeling of periodic diseases, the history/sociology of African Americans in science, and the relationship between mathematics and physics. As of 2016, he has published more than 335 peer-reviewed scientific/mathematical research articles; written and/or edited 17 books; published over 390 abstracts; and authored nearly 100 scientific bio-essays, book reviews, and commentaries. He serves on editorial boards of several research journals, including the Journal of Difference Equations and Applications and the International Journal of Evolution Equations. His scholarly writings have appeared in reference works such as African American Lives (Oxford University Press), American National Biography (Oxford University Press), and Biographical Encyclopedia of Scientists (Marshall Cavendish). His honors include fellowships from the Ford, Woodrow Wilson, and National Science Foundations; and election to Phi Beta Kappa (1964). During 1998-99, he was an American Physical Society Centennial speaker (as part of the activities to celebrate the 100th anniversary of the founding of the APS). He also served as a Distinguished National Lecturer for Sigma Xi, The Scientific Research Society for 2000 – 2002. His professional memberships include the American Association for the Advancement of Science, the American Physical Society (for which he is an elected Fellow), the History of Science Society, the Society for Mathematical Biology, and the American Mathematical Society.
In July 2014, “The Brauer-Mickens Distinguished Seminar Series,” in the Simon A. Levin Mathematical, Computational and Modeling Center (Arizona State University), was inaugurated to honor Ronald Mickens for his “stellar scholarly contributions to the mathematical, engineering, and natural sciences … and (his) overall service and mentorship to the applied mathematical sciences community.”
Access to a multi-hour interview with Professor Mickens is posted at http://www.thehistorymakers.com/biography/Ronald-n. This interview covers a variety of issues related to his family life, career, and scientific contributions. The Amistad Research Center, Tulane University, New Orleans, LA, houses a large collection of his personal and scientific correspondence.
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(404) 894-8839
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Abstract
Articular cartilage is a remarkable material in its ability with withstand hundreds of millions of loading cycles throughout its lifetime with minimal capacity to self-repair. This load-bearing capacity arises from its unique structure, which is comprised of interpenetrating networks of stiff collagen and highly charged proteoglycans. These constituents are arranged heterogeneously throughout the tissue, with composition varying locally based on anatomic location and tissue depth. This heterogeneous composition give rise to local heterogeneities in tissue properties, which are relevant to tissue function and signaling of the cells embedded within it.
We have developed techniques in confocal elastography and both Raman and FTIR microscopy that enable measurement of local mechanics and composition on the length scale of 10-20 µm. These techniques enabled us to identify large mechanical gradients in the tissue, where shear modulus varies by more than a factor of 100 over a length scale of 100 µm. By spatially registering this information with data from local composition, we have measured structure-property relationships that implicate molecular connectivity as playing a key role in dictating the transition between stiff and compliant regions of the tissue. These findings facilitate a new understanding of this complex tissue as well as give fundamental insight into mechanisms of tissue damage and pathology that occur in tissues such as osteoarthritis.
Biography
Dr. Bonassar joined Cornell University in 2003 after five years on the faculty of the Center for Tissue Engineering at the University of Massachusetts Medical School. He completed postdoctoral fellowships in the Orthopaedic Research Laboratory at the Massachusetts General Hospital and in the Center for Biomedical Engineering at the Massachusetts Institute of Technology. He currently serves on the editorial board of the journal Tissue Engineering.
]]>Michael Doyle has spent his career developing better ways to detect and control the harmful microbes associated with foods.
He will address many of the challenges of making food safe, beginning at the farm to consumption at the table.
About the Speaker
Michael P. Doyle is Regents Professor of Microbiology and Director of the Center for Food Safety at the Universtiy of Georgia. His research has focused on food safety and security. He has worked closely with the food industry, government agencies, and consumer groups on issues related to the microbiological safety of food.
Doyle has served on the food safety committees of many scientific organizations and as scientific advisor to many organizations, including the CDC, Environmental Protection Agency, Food and Drug Administration, U.S. Department of Agriculture, U.S. Department of Defense, and the World Health Organization.
He is a Fellow of the American Academy of Microbiology, the International Association for Food Protection, and the Institute of Food Technologists. He is a member of the National Academies’ Institute of Medicine.
About the Karlovitz Lecture
The lecture is made possible by an endowment in memory of College of Sciences Dean Les Karlovitz, who served as dean for 16 years until 1989. Seeking to broaden intellectual discourse on campus, the series focuses on speakers whose work has led them to stretch across disciplinary boundaries.
The Centers of Disease Control and Prevention (CDC) estimates that 48 million cases of foodborne illness occur annually in the U.S., with most being of microbial origin.
Michael Doyle has spent his career developing better ways to detect and control the harmful microbes associated with foods.
Abstract:
Hexagonal boron nitride (h-BN), a layered material with a regular network of BN hexagons, is a structural sister system of famous graphite. Due to such chemical structural similarity, BN nanomaterials undergo a development history closely entangling with the carbon analogs, from fullerenes via nanotubes to nanosheets. Nevertheless, different from near metallic graphite, BN are highly insulating and wide-bandgap in properties, and more stable than graphite in thermology and chemistry. These make BN be a perfect sidekick of graphite nanomaterials, and enable their bright prospects in high thermal conductivity, strong ultraviolet emission, glorious thermal and chemical inertness, rubout insulation and superb lubrication. However the insufficient production of BN nanomaterials greatly hampered their studies and rather limited the full realization of their exciting nanotechnology potentials. Herein an overview insight into mass-synthesis and diverse applications of BN and its low-dimensional nanostructures is presented, including nanosheets, nanoribbons, nanotubes and nanoparticles developed by us. Recent year’s novel methods for realizing the high purity mass production of BN nanotubes and nanosheets will be focused, which fundamentally ensures and promotes the studies and applications based on the large quantities of BN nanomaterials. Some BN nanomaterial filled polymeric composites are additionally discussed, which are expected for the heating-release insulting packaging of down-sizing faster electronic devices. In addition, in situ mechanical and electrical properties from individual BN nanomaterials have been successfully studied under the TEMs using STM/AFM-TEM special holders.
Biography:
Yoshio Bando has completed his Ph.D from Osaka University in 1975 and joined the National Institute for Research in Inorganic Materials (at present National Institute for Materials Science, NIMS) the same year. He has been a Fellow of NIMS and a Chief Operating Officer (COO) of International Center for Materials Nanoarchitectonics (WPI-MANA) until April 2017. He is now an Executive Advisor of MANA and also a Distinguished Professor at University of Wollongong, Australia. He has received a number of awards including the “Sacred Treasure” from the Emperor (2017), the 3rd Thomson Reuters Research Front Award (2012), the 16th Tsukuba Prize (2005), the Academic Awards from Japanese Ceramic Society (1997) and others. He is admitted as Fellows of The American Ceramic Society and The Royal Society of Chemistry. He has been selected as ISI Highly Cited Researchers in Materials Science in 2010, 2012, 2014, 2015 2016, and 2017. To date he has authored more than 730 original research papers which have been cited more than 39,000 times at H-factor of 104. His research concentrates on synthesis and property of novel inorganic 1D/2D nanomaterials and their in-situ TEM analysis.
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In this talk, I describe 3 counterintuitive behaviors in simple physical systems. First, I describe experiments showing that small particles climb up a waterful to contaminate a clean reservoir upstream. Second, I describe climbing of shear thickening fluids up a vibrating rod. And third, I describe separation on fine grains from large boulders on asteroids.
All of these behaviors are surprising and counterintuitive, and all follow from mathematical and physical principles that have been known for decades, but have only recently been rediscovered.
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Blake Moret is Chairman and Chief Executive Officer of Rockwell Automation. He assumed the role of CEO on July 1, 2016 and was elected Chairman of the Board effective January 1, 2018. As CEO, Blake leads the world’s largest company focused on industrial automation and information, dedicated to making our customers more productive and the world more sustainable.
Impact of the Factory of the Future A Retrospective
Automation has contributed to sharply increased productivity in virtually all industrial processes, first in developed countries, but now in places with low labor costs as well. What has industrial automation brought society, and where is it going? This talk reviews past expectations of automation, what has flourished and what has fizzled, and what was totally unexpected. Thoughts on the future are offered, amid the backdrop of pervasive computing and communication resources, a rapidly increasing middle class, the skills gap for advanced manufacturing, a heightened interest in sustainability, and the sharing economy.
Lunch served after lecture in GTMI Atrium
]]>Reception at 3:30 p.m. in the GTMI Atrium
Abstract:
Drug delivery across epithelial barriers (oral, transdermal, mucosal) remains the preferred route for drug administration. However, therapeutic macromolecular drugs currently under development cannot easily pass through epithelial tissue. A variety of delivery paradigms have been developed, including chemical permeation enhancers, physical disruptors, and mucuadhesive materials, to enable more effective delivery of therapeutic macromolecules across epithelium but clinical utility has been limited thus far. Nanostructured biomaterials may offer potential advantages over conventional drug delivery strategies by augmenting cytoadhesion and enhancing the transport of drugs, particularly protein therapeutics, through biophysical responses by the cell. In this talk, I will discuss the effect of nanostructured surfaces on the modulation of tight junction permeability and transport of key therapeutic molecules in vitro and in vivo. I will also discuss how micro and nanostructures can be used to control drug kinetics as well as modulate fibrosis and the immune microenvironment, presenting distinct biophysical cues to cells. The effect of geometry and the development of materials that can ultimately enhance therapeutic delivery is important for a broad range of diseases.
Biography:
Dr. Tejal Desai is currently the Ernest L. Prien Professor and Chair of the department of Bioengineering and Therapeutic Sciences at the University of California, San Francisco. She is also a member of the California Institute for Quantitative Biomedical Research, PI of the UCSF/UC Berkeley Graduate Group in Bioengineering Training Grant, and founding director of the UCSF/UC Berkeley Master’s in Translational Medicine. She received the Sc.B. degree in Biomedical Engineering from Brown University in 1994 and the Ph.D. degree in bioengineering from the joint graduate program at University of California, Berkeley and the University of California, San Francisco, in 1998. Dr. Desai currently directs the Laboratory of Therapeutic Micro and Nanotechnology where her research focuses on using micro and nanofabrication techniques to develop devices for cell and drug delivery, scaffolds for cell and tissue regeneration, and functional biomaterials. In addition to authoring over 200 technical papers and delivering over 200 invited talks, she has chaired and organized numerous conferences and symposia in the area of bioMEMS, micro and nanofabricated biomaterials, and micro/nanoscale drug delivery/tissue engineering. Her other interests include K-12 educational outreach, gender and science education, science policy issues, and biotechnology/bioengineering industrial outreach.
Her research efforts have earned recognition including Technology Review’s "Top 100 Young Innovators,” Popular Science’s Brilliant 10, and NSF’s New Century Scholar. Some of her other honors include the Eurand Grand Prize Award for innovative drug delivery technology, the Young Career Award from the Engineering in Medicine and Biology Society (IEEE EMBS), the Dawson Biotechnology award, and the UC Berkeley and Brown University Distinguished Engineering Alumni awards. In 2015, she was elected to the National Academy of Medicine.
Research Laboratory of Tejal Desai
]]>404-894-1746
]]>Reception at 3:30 p.m. in the GTMI Atrium
Abstract:
Nanoscale (molecular) simulations are valuable in macromolecular science since they can be employed, in conjunction with complementary experiments, to predict, tune, and optimize the physical and chemical properties of polymeric materials. Conditions that we investigate include chemical composition of the system, variations in temperature or pressure, application of strain or shear, and changes to the local chemical environments, such as the presence of moisture, air, UV light, additives, coatings, and interfaces. We will specifically discuss the role of processing parameters on the mechanical properties of bicomponent fibers, as well as the use of chemical modifications to tune surface/interfacial functionality and surface characteristics such as chemical repellency.
Biography:
Prof. Melissa Pasquinelli is Associate Department Head and Director of Graduate Programs in the Department of Textile Engineering, Chemistry, and Science at North Carolina State University; she is also a University Faculty Scholar and an Alumni Distinguished Undergraduate Professor. Her research team develops and applies a variety of computational techniques that predict how molecular structures and the dynamics of molecular systems relate to their functional roles, including how they may be affected by thermodynamics, the local chemical environment, and the physical environment. She relishes that she gets to balance her professional time between working on scientific research projects and teaching and mentoring budding engineers and scientists. She received her Ph.D. in chemistry from Carnegie Mellon University and also did postdoctoral studies at Duke University and the U.S. EPA.
The Laboratory of Multiscale Modeling from the Nanoscale
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The symposium is free of charge upon registration, and will provide participants with the opportunity to discover new and innovative technologies in cellulose and paper production. It will be a full day event where guest speakers from French companies will share their expertise and interact with the audience. There will also be a designated B2B area for those wishing to meet with representatives of the presenting companies.
All conference related information, including registration, can be found here at the Paper Symposium website.
]]>Presented by
Professor M. Cristina MarchettiWilliam R. Kenan, Jr. Professor & Distinguished Professor of PhysicsSyracuse University
Abstract
Assemblies of interacting self-driven entities form soft active materials with intriguing collective behavior and mechanical properties. Examples abound in nature on many scales, from the flocking of birds to cell migration in morphogenesis. They also include synthetic systems, from engineered microswimmers to self-catalytic colloids and autonomously propelled liquid crystals. What unifies these systems is that they are driven out of equilibrium by dissipative processes that act on each individual particle, hence break the time reversal symmetry of the dynamics at the microscale. This results in surprising behavior. For instance, active fluids flow with no externally applied driving forces, active gases do not fill their container, and active particles spontaneously organize when passive ones would not. Since time reversal symmetry of the microdynamics and the associated detailed balance of forward and reverse processes are built into the foundation of equilibrium statistical physics, the description of active systems poses a new theoretical challenge. In this talk I will discuss the physics of active matter with examples from both the living and non-living worlds. I will show that by combining minimal physical models with continuum theory and simulations we are making advances towards capturing quantitatively the laws of spontaneous organization of active systems. This theoretical progress has implication for both formulating design principles for new smart materials and understanding cellular and multicellular organization.
Biography
Cristina Marchetti is the William R. Kenan Distinguished Professor of Physics at Syracuse University, where she heads the Soft and Living Matter Program, and currently a Simons Distinguished Visiting Scientist at the Kavli Institute for Theoretical Physics (KITP) at the University of California Santa Barbara. She received her Laurea in physics from the University of Pavia, Italy, and her Ph.D. in physics from the University of Florida. She has held postdoctoral positions at the University of Maryland, Rockefeller University, and City College of CUNY. Marchetti is a versatile theoretical physicist who has worked on a broad range of problems including supercooled fluids, glasses and superconductors. Currently, she is interested in understanding the emergent behavior of soft and biological materials, from flocks of engineered microswimmers to cells in living tissues. Marchetti is currently co-editor of Annual Reviews of Condensed Matter Physics and co-Lead Editor of Physical Review X. She is a Fellow of the American Physical Society and of the American Association for the Advancement of Science, and a member of the American Academy of Arts and Sciences. She has held elected positions in the American Physical Society, and continues to play a leadership role in the scientific community.
Reception to follow
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Sudarsanam Suresh Babu, UT/ORNL Governor's Chair of Advanced Manufacturing Professor, The University of Tennessee, Knoxville
Reception at 3:30 p.m. in the GTMI Atrium
Abstract:
Additive manufacturing enables design and production of structural metallic components with complex geometries. Recent work has shown that, in addition to complex geometries, site-specific microstructures can be achieved through careful control of processing condition at every layer. The interactions between boundary conditions imposed by component geometry, wide variations of thermal signatures brought about by mode of energy delivery, and composition of the alloys. These phenomena are studied using computer modeling, in-situ monitoring and ex-situ characterization tools. This talk will review results from two case studies and associated fundamental challenges in extending these methodologies to wide range of alloys. First, control of crystallographic texture, during electron beam powder melting of Inconel 718 alloy, was achieved by controlling thermal gradient (G) and liquid-solid interface velocity (R). The sensitivity of columnar to equiaxed transitions in solidification maps was related to uncertainty of parameters used in the interface response function theories, as well as, spatial and temporal variations in G and R. Second study focused on using laser melting experiments and post-process heat treatment as an alloy evaluation methodology. Microstructures in the melt regions of model Al-12Ce alloy confirmed the feasibility of selecting wide range of solidification microstructures through spatial variations of G and R along the 3D melt pool surface, as well as, stability of eutectic structures during post-process heat treatments. Extension of the above approach to solid-state additive manufacturing will also be introduced.
Biography:
Dr. Babu obtained his bachelors degree in metallurgical engineering from PSG College of Technology, Coimbatore, INDIA and his master’s degree in industrial welding metallurgy-materials joining from Indian Institute of Technology, Madras. He obtained his PhD in materials science and metallurgy from University of Cambridge, UK in 1992. He also worked as a research associate in the prestigious Institute for Materials Research, Sendai, Japan before joining ORNL in 1993. From 1993 to 1997, he held joint researcher position with ORNL, University of Tennessee and The Penn State University. From 1997 to 2005, he worked as an R&D staff at ORNL. From 2005 to 2007, Suresh held a senior level technology leader position in the area of engineering and materials at Edison Welding Institute, Columbus, Ohio. From 2007 to 2013, Suresh served as Professor of Materials Science and Engineering and Director of NSF I/UCRC Center for Materials Joining Science for Energy Applications, at The Ohio State University. In 2013, Suresh was appointed as UT/ORNL Governor’s chair of advanced manufacturing at the University of Tennessee, Knoxville, TN. In this role he acts as a bridge to the ORNL’s expertise and infrastructure including manufacturing demonstration facility to develop a collaborative research and education ecosystem locally and deploy engineering solutions to manufacturing industries. Dr. Babu has published 190 journal papers and numerous conference proceedings. He has received many awards in recognition of his technical and leadership service to the materials and manufacturing community. He is a fellow of AAAS, ASM International and AWS.
In the last three years, Suresh has been instrumental and part of the team in securing UTK and ORNL’s leadership in NSF and Presidential initiatives related to national network of manufacturing innovation institutes. With his ability to foster collaborative activities with ORNL associates and UTK faculty, UTK has secured the following projects: NSF/IUCRC center for materials and manufacturing, Powder processing pillar of lightweight innovation for future (LIFT), and Institute for Advanced Composites Manufacturing Innovation Institute (IACMI).
The University of Tennessee, Knoxville Suresh Sudarsanam Profile Page
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404-894-1746
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Tuesday, February 13, 2018
10:30am – 12:00pm LANL Overview Callaway/GTMI Auditorium
12:00 – 1:00pm Lunch (Pizza) Callaway/GTMI 1st Floor Atrium
1:00 – 3:00pm One‐on‐one Student Callaway/GTMI Interviews* Rooms 201, 401, 431
3:00 – 4:00pm Steministas @ LANL Love 109 (A session for women engineers at GT)
If you would like to participate in the LANL Overview please RSVP to Dracy Blackwell, dracy.blackwell@mse.gatech.edu, by no later than 4pm on Friday, February 9, 2018.
*If you would like to participate in the student interviews, please include a PDF of your resume/CV with your RSVP. Your CV/resume will be provided to the LANL reps.
dracy.blackwell@mse.gatech.edu
]]>Also available via live stream at president.gatech.edu. Questions should be submitted within 24 hours of the event to the Provost's Office..
]]>Tom Rosenmayer, PhD, Vice President of Development
Lehigh Technologies
Abstract:
Abstract: The presentation is essentially as case study that will describe the development of a new class of sustainable materials: EkoDyne® functional compound. The global tire industry consumes vast amounts of polymers, including natural rubber, butadiene rubber, butyl rubber, and increasing amounts of complex dual-functionality solution styrene-butadiene rubbers. Disposal of end-of-life tires is challenging for a number of reasons, including the recycling of thermoset vulcanizates. Historical efforts to devulcanize tire rubbers have produced degraded elastomers that are not capable of being sustainably recycled back into tire rubber compounds. EkoDyne® functional compound has been developed to address the unmet market of a high performance and sustainable tire rubber compound. The market and technology development timeline will be covered along with performance and analytical tests results for this new material.energy utilization enhancement. This talk will also cover our recent efforts in the areas of electronic structure elucidation with a particular focus on bimetallic MOFs as well as testing framework modularity towards engineering actinide-based materials.
Biography:
Tom Rosenmayer is currently VP Development for Lehigh Technologies Inc., which is a Michelin Group Company, where he is responsible for new business development and intellectual property management. Lehigh is the leading global supplier of micronized rubber powders sourced from sustainable feedstocks. Prior to Lehigh, Tom worked at W.L. Gore, IBM, and Baker-Hughes. Over the past 25 years, Tom has lead advanced materials development projects in a wide variety of industries, including electronic packaging, semiconductors, consumer apparel, asphalt, and tires.
Reception at 3:30 p.m.
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The Symposium on Soft Matter Forefronts will provide researchers an unparalleled opportunity to learn and discuss ideas and research results on the developing edge of soft matter science.
The number of attendants is limited, so please, register soon. Students and post-docs registration is $150. Standard registration is $250. Registration includes symposium materials, lunch for all three days and a welcome reception on Thursday. A list of nearby hotels and restaurants are already posted in the symposium web site, where we will also post the final program of the event.
Symposium location will be posted at a later date.
]]>Vivek Sharma, Assistant Professor
University of Illinois Chicago
Abstract:
Liquid transfer and drop formation/deposition processes involve complex free-surface flows including the formation of columnar necks that undergo spontaneous capillary-driven instability, thinning and pinch-off. For simple (Newtonian and inelastic) fluids, a complex interplay of capillary, inertial and viscous stresses determines the nonlinear dynamics underlying finite-time singularity as well as self-similar capillary thinning and pinch-off dynamics. In rheologically complex fluids, extra elastic stresses as well as non-Newtonian shear and extensional viscosities dramatically alter the nonlinear dynamics. Stream-wise velocity gradients that arise within the thinning columnar neck create an extensional flow field, and many complex fluids exhibit a much larger resistance to elongational flows than Newtonian fluids with similar shear viscosity. Characterization of pinch-off dynamics and the response to both shear and extensional flows that influence drop formation/deposition in microfluidic and printing applications requires bespoke instrumentation not available, or easily replicated, in most laboratories. Here we show that dripping-onto-substrate (DoS) rheometry protocols that involve visualization and analysis of capillary-driven thinning and pinch-off dynamics of a columnar neck formed between a nozzle and a sessile drop can be used for measuring shear viscosity, power law index, extensional viscosity, relaxation time and the most relevant processing timescale for printing. We showcase the versatility of DoS rheometry by characterizing and contrasting the pinch-off dynamics of a wide spectrum of simple and complex fluids: water, printing inks, semi-dilute polymer solutions, yield stress fluids, food materials and cosmetics. We show that DoS rheometry enables characterization of low viscosity printing inks and polymer solutions that are beyond the measurable range of commercially-available capillary break-up extensional rheometer (CaBER). We show that for high viscosity fluids, DoS rheometry can be implemented relatively inexpensively using an off-the-shelf digital camera, and for many complex fluids, similar power law scaling exponent describes both neck thinning dynamics and the shear thinning response. Using a particular example of aqueous polymer solutions, we show the measurement of both the extensional relaxation time and extensional viscosity of weakly elastic, polymeric complex fluids with low shear viscosity η < 20mPa. S and relatively short relaxation time, λ < 1 ms. Lastly, we utilize DoS rheometry to probe and elucidate how polymer composition, flexibility, concentration, charge and molecular weight determine the kinetics of capillary-driven thinning and pinch-off in our experiments.
Biography:
Dr. Vivek Sharma is an Assistant Professor of Chemical Engineering at the University of Illinois Chicago. Before joining UIC in November 2012, he worked as a post-doctoral research associate in Mechanical Engineering at Massachusetts Institute of Technology. He received his Ph. D. (Polymers/MSE, 2008) and M. S. (Chemical Engineering, 2006) from Georgia Tech., an M. S. (Polymer Science, 2003) from the University of Akron, and a bachelor's degree from IIT Delhi. Dr. Sharma's research interests broadly lie in optics, dynamics, elasticity, and self-assembly (ODES) of complex fluids and soft materials. At UIC, Dr. Sharma's Soft Matter ODES-lab combines experiments and theory to pursue the understanding of, and control over interfacial and nonlinear flows, focused on the interplay of (a) viscoelasticity and capillarity for printing applications and extensional rheometry, and (b) interfacial thermodynamics and hydrodynamics in fizzics (the science of bubbles, drops, thin films, jets, fibers, emulsions and foams). Dr. Sharma was selected as the Distinguished Young Rheologist by TA Instruments in 2015, and won the 2017 College of Engineering Teaching Award at UIC.
Reception at 3:30 p.m. in the GTMI/Callaway Manufacturing Research Center Building Atrium.
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Peidong Yang, S.K. Angela Chan Distinguished Chair
University of California, Berkeley
Abstract:
Solar-to-chemical (STC) production using a fully integrated system is an attractive goal, but to-date there has yet to be a system that can demonstrate the required efficiency, durability, or be manufactured at a reasonable cost. One can learn a great deal from the natural photosynthesis where the conversion of carbon dioxide and water to carbohydrates is routinely carried out at a highly coordinated system level. There are several key features worth mentioning in these systems: spatial and directional arrangement of the light-harvesting components, charge separation and transport, as well as the desired chemical conversion at catalytic sites in compartmentalized spaces. In order to design an efficient artificial photosynthetic materials system, at the level of the individual components: better catalysts need to be developed, new light-absorbing semiconductor materials will need to be discovered, architectures will need to be designed for effective capture and conversion of sunlight, and more importantly, processes need to be developed for the efficient coupling and integration of the components into a complete artificial photosynthetic system. In this talk I will begin by discussing the challenges associated with fixing CO2 through traditional chemical catalytic means, contrasted with the advantages and strategies that biology employs through enzymatic catalysts to produce more complex molecules at higher selectivity and efficiency. I then discuss a number of different photosynthetic biohybrid systems (PBS) architectures from the last few years, and the numerous strategies to interface biotic and abiotic components. Each demonstrates the advantages of PBSs in converting sunlight, H2O and CO2 into food, fuels, pharmaceuticals, and materials. Finally, I will outline the future of this field, opportunities for improvement, and its role in sustainable living here on Earth, and beyond.
Biography:
Peidong Yang is a Chemistry professor, S. K. and Angela Chan Distinguished Chair Professor in Energy at the University of California, Berkeley. He is known particularly for his work on semiconductor nanowires and their photonic and energy applications. He is one of the co-directors for the Kavli Energy Nanoscience Institute at Berkeley. Dr. Yang received his B.A. in Chemistry from the University of Science and Technology in China in 1993. He then received his Ph.D. in Chemistry from Harvard University in 1997, and did his postdoctoral fellowship at the University of California, Santa Barbara. Soon after, he began his Assistant Professorship at the University of California, Berkeley. He is the recipient of MacArthur Fellowship, E. O. Lawrence Award, ACS Nanoscience Award, MRS Medal, Baekeland Medal, Alfred P. Sloan research fellowship, the Arnold and Mabel Beckman Young Investigator Award, National Science Foundation Young Investigator Award, MRS Young Investigator Award, Julius Springer Prize for Applied Physics, ACS Pure Chemistry Award, and Alan T. Waterman Award. He is a member of both the National Academy of Sciences and the American Academy of Arts and Sciences.
Reception at 5:00 p.m.
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Abstract:
Graphene based electronic and spintronic devices require understanding the growth of metals on graphene. Several metals (Gd, Dy, Eu, Fe,Pb) deposited on epitaxial graphene were studied with STM, SPA-LEED and DFT. For practically all metals the growth mode is 3-d[1,2].This is a result of the low ratio of the metal adsorption to metal cohesive energy and repulsive interactions between unscreened charges at the metal-graphene interface that favor islands of small “footprint". It is an open challenge to find ways to modify the growth to layer–by–layer for high quality metal contacts and graphene applications as a spin filter. By growing Dy at low temperatures or high flux rates it is found that upward adatom transfer is kinetically suppressed and layer-by-layer is possible[3]. These results are also relevant for metal growth on other 2-d van der Vaals materials that also have weak bonding with metals and favor 3-d metal growth.
The graphene-metal interaction is also important for metal intercalation which provides a novel way to tune graphene’s properties, besides doping. However many issues related to the intercalation process itself are poorly understood, i.e., the temperature and entry points where atoms move below graphene, different intercalation phases, their coverage, etc. SPA-LEED and STM were used to study these questions for Dy intercalation. Spot profiles of several spots (specular, 6sq(3), graphene) are studied as function of temperature and electron energy to deduce the kinetics of intercalation and the layer where the intercalated atoms reside.
Dy nucleation experiments were performed on graphene partially intercalated with Dy. The results show that nucleation is preferred on the intercalated than on the pristine areas. Difference in doping between the two areas generates an electric field that transforms random walk to directional diffusion and accounts for the guided nucleation[4]. This can be a general method to control patterning of metallic films on graphene.
References
1.M. Hupalo et al Advanc. Mater. 23 2082 (2011) 2.X. Liu, et al. Progr. Surf. Sci. 90 397 (2015) 3. D. Mc Dougall et al Carbon 108 283 (2016)) 4. X. Liu et al. Nano Research 9(5): 1434 (2016)
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Abstract:
The Savannah River Site in Aiken, SC was constructed in the 1950’s to produce the basic materials necessary in the fabrication of nuclear weapons, primarily tritium and plutonium-239. Five reactors were also built in an effort to produce these materials for our nation’s defense programs. In support of these efforts, the Savannah River Laboratory was created. In 2004, the lab became Savannah River National Laboratory and has three main focus areas: National Security, Environmental Stewardship, and Clean Energy. The this presentation will discuss the history of the Savannah River Site, the role of the Savannah River National Laboratory in the safety and security of the nation, as well as the immobilization of legacy nuclear waste.
Biography:
Marissa Reigel is a senior engineer at Savannah River National Laboratory in Aiken, South Carolina. Her research includes the processing, formulation, and performance properties of nuclear wasteforms as well as investigating erosion/corrosion issues associated with nuclear waste processing. She is an active member of the American Ceramic Society and ASM International. Marissa received her B.S. (’05) and Ph.D. (’09) in Metallurgical and Materials Engineering from the Colorado School of Mines.
Reception at 3:30 p.m.
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Abstract:
In the first part, I will address phosphors that play a key role in the now almost-mature solid-state white-lighting technologies based on combining a III-nitride-based near-UV or blue solid-state light source with down-conversion to longer wavelengths. Almost all widely used phosphors comprise a crystalline oxide, nitride, or oxynitride host that is appropriately doped with either Ce3+ or Eu2+. Optical excitation into these states and concomitant reemission can be tuned into the appropriate regions of the visible spectrum by the crystal these ions are hosted in. Experimental studies of some of the best phosphor materials, employing state-of-the-art structural tools, have yielded guidelines for what are desirable structural features. We find that a useful sorting diagram for efficient hosts with high quantum yield has the band gap of the host – readily calculated with high reliability using hybrid functionals in DFT – as one of the axes, and the calculated Debye temperature as the other axis.
In the second part, I will describe a new effort to seek out exciting new room-temperature magnetocaloric materials. The material property of interest in finding candidate magnetocaloric materials is their gravimetric entropy change upon application of a magnetic field under isothermal conditions. We have proposed a simple computational proxy based on carrying out non-magnetic and magnetic density functional theory calculations on magnetic materials. This proxy, which we refer to as the magnetic deformation ΣM, is a measure of how much the unit cell deforms when comparing the relaxed structures with and without the inclusion of spin polarization. ΣM appears to correlate very well with experimentally measured magnetic entropy change values.
Biography:
Ram Seshadri is the Fred and Linda R. Wudl Professor of Materials Science at UC Santa Barbara. He is also a Professor in the Department of Chemistry and Biochemistry. He received his PhD in Solid State Chemistry in 1995 from the Indian Institute of Science, Bangalore, and after some years as a post-doctoral fellow in Europe, returned to Bangalore as an Assistant Professor in 1999. He moved to UC Santa Barbara in 2002. At UCSB, he also serves as the Director of the Materials Research Laboratory: A National Science Foundation Materials Research Science and Engineering Center (NSF-MRSEC). His research work, embodied in nearly 300 publications, addresses the topic of structure-property relations in crystalline inorganic materials, with a focus on materials for energy applications. He is a Fellow of the Royal Society of Chemistry, and of the American Physical Society. He has served on the Editorial Committee of Annual Reviews of Materials Research since 2008, and as an Associate Editor of Chemistry of Materials since 2015.
Reception at 3:30 p.m.
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Abstract:
Two-dimensional (2D) materials—graphene, hBN, and some clays—exhibit properties unattainable from their three-dimensional (3D) brethren. The differentiation derives primarily from alterations in the bandstructure and density of states (DOS) that emerge with loss of dimension. Effectively surfaces, the same 2D nature imbuing this promise also makes them acutely sensitive to the materials surrounding them. This sensitivity typically degrades performance and hence approaches most often attempt to minimize the interactions between a 2D-material and that of its surroundings. Here, an opposite tact is taken where these interactions are instead leveraged to enable functionality.
First, spectrally tunable infrared filters are created by altering graphene’s plasmonic dispersion using the dielectrics surrounding it resulting in gate-tunable variations of reflectance by over 1 μm. Subsequently, capacitive coupling between the substrate and the graphene is leveraged to realize a highly sensitive optical detector (>2,500 A/W) possessing the ability to integrate signal like a CCD while providing constant local read-out like a photodiode opening up new paradigms in sensing. Taken together, these
case studies highlight the utility of employing interlayer interactions for function in 2D-systems rather than considering them a parasitic source to be avoided.
Biography:
Thomas Beechem is a staff scientist in the Nanoscale Sciences Department at Sandia National Laboratories in Albuquerque, NM. In this role, Thomas leads efforts focused on elucidating, and then leveraging, thermal physics and the material responses of low-dimensional systems to enable next generation opto- and power electronics. He has authored over 60 archival publications and had his work selected as the featured “cover article” on 5 separate occasions by 4 different periodicals. He received a
2015 Defense Program Award of Excellence and was named one of Sandia’s “Up and Coming Innovators” in 2016. In 2017, he was named an associate editor of the Journal of Heat Transfer. Thomas has been at Sandia since 2009 where he began immediately after obtaining his doctorate from the Georgia Institute of Technology in Mechanical Engineering under Samuel Graham.
Pizza and discussion to follow!
BRING RESUMES!
*This seminar is FREE of charge but registration is required to receive complementary lunch*
Data will include measurements from:
Register to attend and secure your lunch for the event here.
For additional information: http://www.anasysinstruments.com or contact Jay Anderson: jay@anasysinstruments.com
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Schedule of Workshops (several will be offered multiple times to accommodate schedules of participants):
1. Using MATIN for your data science-focused projects
a. 3:00 p.m., 12/01/2016, Paper Tricentennial Bldg. Room 114
b. 3:30 p.m., 12/05/2016, Paper Tricentennial Bldg. Room 114
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Schedule of Workshops (several will be offered multiple times to accommodate schedules of participants):
1. Using MATIN for your data science-focused projects
a. 3:30 p.m., 12/05/2016, Paper Tricentennial Bldg. Room 114
]]>A couple of members of Professor McDowell's group will present their research.
3:00 PM - 3:45PM Professor David McDowell
"Multiscale Crystal Plasticity Modeling for Metals"
3:45PM - 4:00PM Break with Discussions
4:00PM - 4:25PM Shuozhi Xu (PhD Candidate)
"Algorithms and Implementation for the Concurrent Atomistic-Continuum Method"
4:25PM - 5PM Discussion of open problems stemming from the presentations.
"Multiscale Crystal Plasticity Modeling for Metals"
Abstract
Crystal plasticity modeling is useful for considering the influence of anisotropy of elastic and plastic deformation on local and global responses in crystals and polycrystals. Modern crystal plasticity has numerous manifestations, including bottom-up models based on adaptive quasi-continuum and concurrent atomistic-continuum methods in addition to discrete dislocation dynamics and continuum crystal plasticity. Some key gaps in mesoscale crystal plasticity models will be discussed, including interface slip transfer, grain subdivision in large deformation, shock wave propagation in heterogeneous polycrystals, and dislocation dynamics with explicit treatment of waves. Given the mesoscopic character of these phenomena, contrasts are drawn between bottom-up (e.g., atomistic and discrete dislocation simulations and in situ experimental observations) and top-down (e.g., experimental) information in assembling mesoscale constitutive relations and informing their parameters.
"Algorithms and Implementation for the Concurrent Atomistic-Continuum Method"
Abstract
Unlike many other multiscale methods, the concurrent atomistic-continuum (CAC) method admits the migration of dislocations and intrinsic stacking faults through a lattice while employing an underlying interatomic potential as the only constitutive relation. Here, we build algorithms and develop a new CAC code which runs in parallel using MPI with a domain decomposition algorithm. New features of the code include, but are not limited to: (i) both dynamic and quasistatic CAC simulations are available, (ii) mesh refinement schemes for both dynamic fracture and curved dislocation migration are implemented, and (iii) integration points in individual finite elements are shared among multiple processors to minimize the amount of data communication. The CAC program is then employed to study a series of metal plasticity problems in which both dislocation core effects at the nanoscale and the long range stress field of dislocations at the submicron scales are preserved. Applications using the new code include dislocation multiplication from Frank-Read sources, dislocation/void interactions, and dislocation/grain boundary interactions.
Biography
Regents’ Professor and Carter N. Paden, Jr. Distinguished Chair in Metals Processing, Dave McDowell joined Georgia Tech in 1983 and holds appointments in both the GWW School of Mechanical Engineering and the School of Materials Science and Engineering. He served as Director of the Mechanical Properties Research Laboratory from 1992-2012. In August 2012 he was named Founding Director of the Institute for Materials (IMat), a Georgia Tech interdisciplinary research institute charged with cultivating a campus-wide materials innovation ecosystem for research and education. IMat is involved in regional and national leadership roles for the Materials Genome Initiative see http://www.materials.gatech.edu.
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Sung Ha Kang
404-385-7678
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What to expect:
Presentations by Researchers from ORNL’s Center for Nanophase Materials Sciences:
Ben Doughty
Anton Ievlev
Olga Ovchinnikova
Alex Belianonov
Miaofang Chi
Ray Unocic
Jon Poplawsky
Presentations by Georgia Tech Faculty:
Natalie Stingelin, Schools of Materials Science & Engineering and Chemical & Biomolecular Engineering
Jennifer Curtis, School of Physics
Christine Payne, School of Chemistry & Biochemistry
Henry (Pete) La Pierre, School of Chemistry & Biochemistry
Faisal Alamgir, School of Materials Science & Engineering
Nian Liu, School of Chemical & Biomolecular Engineering
Discussions and Networking to Build New Collaborations
Lunchtime Meeting for Students on Graduate Opportunities at ORNL
Questions?
Contact Ashley Edwards at
ashley.edwards@cos.gatech.edu
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Director of Institute of Applied Physics and Materials Engineering, University of Macau
Abstract:
We demonstrate a technique to determine the Van der Waals radius of an iodine atom using Raman scattering. The iodine diatomic molecules are diffused into the nano channels of a zeolite single crystal. Their polarized Raman spectroscopy, which corresponds to iodine molecule’s vibrational motion along the direction of molecular axis, is significantly modified by the rigid wall of the nano-channels. From the number of excitable vibration quantum states of the confined iodine molecules determined from Raman spectra and the size of the nano-channels, we determined the iodine atomic radius to be 2.10±0.05 Å, with a pretty good accuracy although its scale is far beyond the diffraction limit of the visible laser wavelength.
Biography:
Currently is Chair Professor and Director of Institute of Applied Physics and Materials Engineering, University of Macau. Before he joined to University of Macau in Jan 2016, he has been working for Hong Kong University of Science and Technology, as professor in the Department of Physics.
Prof. Tang is a pioneer in research on wide bandgap semiconductor photo-electronic physics and devices. With outstanding achievements in the field of zinc oxide ultraviolet lasing materials and devices, he won a State Natural Science Award (2nd class) in 2003. In 2000, he developed a unique technique to produce the world’s smallest single-walled carbon nanotubes (SWNTs), with diameter of only 0.4 nm, which has been hailed as a revolutionary epoch-making material. Later, he observed novel one-dimensional superconductivity in these ultra-small SWNTs, causing a stir in the global scientific community. He was among the first group of professors recruited under China’s “Thousand Talent Scheme”. He has published more than 300 papers in prestigious international journals, with citation frequency of over 12100 times. His pioneer research work on zinc oxide ultraviolet laser emission published on Applied Physics Letters is among the top 50 most cited papers in the past 50 years listed in the special 50th Anniversary edition of Applied Physics Letters.
]]>Join us to learn from Nanoscribe engineers how the IEN's newest tool, the Photonic Professional GT 3D laser lithography system, can enhance and accelerate your lithography based research. The Nanoscribe 3D laser lithography system is ideal for those working in fields of photonics and micro-optics, microelectromechanical systems (MEMS), microsystems and microfluidic components for regenerative medicine, cell biology and tissue engineering, multifunctional nanomaterials, as well as optical and mechanical metamaterials.
System Features:
Abstract:
Multiscale and multiphysics materials modeling tackles the challenging materials problems that involve multiple physical phenomena at multiple spatial and temporal scales. In this talk, I will present the multiscale and mulphysics models developed in my research group with a recent focus on energy storage materials and advanced structure materials. Our study of rechargeable lithium ion batteries for energy storage applications reveals a rich spectrum of electrochemically-induced mechanical degradation phenomena. The work involves a tight coupling between multiscale chemomechanical modeling and in situ nanobattery testing. Our study of nanostructured metals and alloys elucidates the effects of nanostructures on the size-dependent strengths and surface/interface-mediated deformation mechanisms. Finally, I will present our recent studies of high entropy alloys and additively manufactured materials. Overall, our research synergistically integrates modeling and in situ experiment in order to design the advanced structural and functional materials to realize their potential to the full.
Biography:
Ting Zhu is a professor and a Woodruff Faculty Fellow in the George W. Woodruff School of Mechanical Engineering at Georgia Institute of Technology. He also holds a courtesy appointment in the School of Materials Science and Engineering. He received his Ph.D. in Mechanical Engineering from Massachusetts Institute of Technology in 2004. He worked as a postdoctoral associate at Harvard University, before joining Georgia Tech in 2005. His research is focused on the mechanics and materials modeling. He receives the Sia Nemat-Nasser Early Career Award from the American Society of Mechanical Engineers in 2013 and the Young Investigator Medal from the Society of Engineering Science in 2014.
Reception at 3:30 p.m. in the Georgia Tech Manufacturing Institute Atrium
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Abstract:
The principles of green chemistry and engineering are creating a culture change for both academia and industry. In particular, the transition from batch processes to continuous flow technologies in the chemical and pharmaceutical industries has become an important component of this culture change. A variety of continuous flow processes dealing with the syntheses of pharmaceutically important molecules will be discussed. These include (1) the two-step reaction sequences for the preparation of a diazo ketone, (2) the Meerwein-Ponndorf-Verley (MPV) reductions of aldehydes and ketones and (3) the Lewis acid-catalyzed heteroaromatic homo-Nazarov reaction. The transfer of process variables from batch to continuous flow for each of these synthetic processes will be discussed.
Biography:
Dr. Charles Liotta is a Regents Professor Emeritus in the School of Chemistry and Biochemistry. Dr. Liotta received his B.S. Chemistry from Brooklyn College in 1959; his Ph.D. in Chemistry from the University of Maryland in 1963. His research activities involve both synthetic-organic and physical-organic chemistry. His major interests lie in the areas of structure-property relationships, kinetics and mechanisms of organic reactions, asymmetric synthesis, homogeneous and heterogeneous catalysis (phase transfer catalysis), the development of environmentally benign tunable (supercritical fluids, near critical water, gas expanded liquids)and smart (reversible ionic liquids, DMSO substitutes) solvent systems, and molecular thermodynamics, solution theory, and phase equilibria. A fundamental goal of Dr. Liotta’s research is the development of sustainable and environmentally benign chemicals and chemical processes. Dr. Liotta has been collaborating with Dr. Charles A. Eckert for approximately 20 years.
Reception at 3:30 p.m. in the GTMI Atrium
]]>Foster's expertise are in the design, synthesis, processing and investigation of functional nanocomposites, biomaterias, supramolecular materials and polymers.
Read more here: http://petitinstitute.gatech.edu/petit-institute-seminar-co-hosted-gts-renewable-bioproducts-institute
]]>Dr. Blair Brettmann
Assistant ProfessorSchool of Materials Science and EngineeringGeorgia Institute of TechnologyAbstract
Rapid development of multifunctional, modular and easily customizable products requires an integrated approach to the product development process, both in tying molecular level behavior of the materials to macroscopic product properties and in integrating multiple scientific approaches to obtain a full picture of the fundamental material behavior. Specifically, rational prediction of functionality and stability of advanced materials requires us to understand interactions in multicomponent mixtures on the molecular scale. I will demonstrate this using a system commonly encountered in industrial formulations, the polyelectrolyte brush. These structures are often used to stabilize colloidal dispersions, but have been shown to collapse and lead to aggregation when multivalent ions are also present in the mixture. Until now, the nature of and mechanism behind this collapse was not understood, leading to difficulties in predicting the behavior of these systems. Through a combination of theory, simulations and experiments, my collaborators and I have demonstrated that the brush collapses into nanoscale “pinned micelles” due to a combination of solvophobic and electrostatic bridging effects. This fundamental understanding leads to better prediction of collapse transitions in these colloidal dispersions and capabilities for rational design of new, stimuli-responsive materials.
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Dr. Shyh-Chiang Shen, Associate Professor
School of Electrical and Computer EngineeringGeorgia Institute of Technology
Abstract
The III-Nitride (III-N) materials have enabled several important technology breakthroughs in recent years, most notably as the building semiconductors for the solid-state lighting technology and next-generation detecting deep ultraviolet (DUV) photon emitters and detectors for applications in water sanitation, bio-detection, and astrophysics studies. The wide bandgap properties and high electron saturation velocity in III-N materials also attracted extensive R&D efforts in high-power millimeter-wave and radio-frequency electronic circuits. Today, III-N HFETs are highly sought in energy-efficient DC-DC converters from 12V up to 1.2-kV. As a complementary device technology, III-N heterojunction bipolar transistors (HBTs) and related bipolar switches offer new opportunities for ultra-high-power operation because of their normally off and vertical current conduction capabilities. This talk will present a summary of III-N electronic device development for power applications. We have demonstrated state-of-the-art InGaN HBTs at Georgia Tech and high-performance GaN PIN rectifiers with device characteristics approaching the theoretical limit for GaN materials. With significant progress in the development of III-N transistors and vertical bipolar switches, GaN-based power electronic devices could offer a disruptive technology basis for the future high-temperature, high-power electronic components in applications such as electric vehicles, HVAC systems, and future power grids.
Bio
Shyh-Chiang Shen received his Ph.D. at the University of Illinois at Urbana-Champaign in 2001. His expertise and background have been in advanced semiconductor device research and high-speed integrated circuits. He was involved in the research of low-voltage RF MEMS switches and ion-implanted GaAs MESFET, and developed a proprietary InP SHBT technology that led to the first demonstration of monolithically integrated 40Gb/s differential-output optical receivers. Shen joined Georgia Tech in 2005 and is conducting focused research on III-N device technologies, including deep-ultraviolet (DUV) high-sensitivity avalanche photodiodes, III-N lasers in blue-green, UVA and DUV bands, high-voltage III-N HFETs, and InGaN HBTs. Shen is a senior member of the IEEE and OSA. He holds 8 awarded U.S. patents and is an author or a co-author of more than 150 technical papers in refereed journals and conferences. He is a recipient of the 2000 Gregory E. Stillman fellowship in ECE at UIUC, the 2010 Richard M. Bass/Eta Kappa Nu Outstanding Teacher Award in the School of ECE at Georgia Tech, the 2011 Outstanding Junior Faculty Member Award in the School of ECE at Georgia Tech, and the 2012 Outstanding Undergraduate Research Mentor Award at Georgia Tech.
Pizza lunch will be provided, however we ask that you limit yourself to two slices so that all attendees are accommodated.
A live stream of this lecture may be viewed at this link
]]>Dr. Amin Salehi-Khojin
Assistant Professor
Mechanical and Industrial Engineering
University of Illinois at Chicago
Abstract
World energy consumption is projected to more than double by 2050 and to more than triple by the end of the century. Incremental improvements in existing energy networks will not be adequate to supply this demand in a sustainable and affordable way. Finding sufficient supplies of clean energy for the future is one of world’s most daunting challenges. In this talk, I will overview my recent research focusing on structure-property-processing correlations in two dimensional (2D) materials leading to several breakthroughs in the field of energy conversion and storage systems. Specifically, I will discuss (i) our recently discovered transition metal dichalcogenide (TMDC) based artificial leaf platform that exhibits 1000 times higher catalytic activity compared to state-of-the-art catalysts for carbon dioxide (CO2) conversion to fuel, (ii) first demonstration of a Li-air battery system that operates in the presence of actual air components (a mixture of nitrogen, O2, CO2 and moisture) rather than pure oxygen and exhibits excellent stability tested up to 550 cycles, and (iii) our recent progress on thermal transport in 2D material based nano-electronics supported by the NSF-EFRI program.
Bio
Dr. Amin Salehi-Khojin is an assistant professor in the department of mechanical and industrial engineering at University of Illinois at Chicago. He is co-author of more than 55 journal publications, including three papers in Science, one in Nature, one in Nature Nanotechnology, and three in Nature Communications. He is also co-inventor of more than 10 patents/patent application. His research has been featured in more than 2000 news releases including Science, Times, Guardian, New York Post, Huffington Post, Daily Mail, Forbes, Christian Science Monitor, MIT Technology Review, Midwest Energy News, Chicago Tribune. He has been cited as one of 100 leading global thinkers in 2016 by Foreign Policy Magazine. He is also listed among "Illinois Researchers Who Wowed Us in 2016".
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The role of polymers in the electronics and medical arenas, particularly in miniaturized devices and electronic components, continues to grow rapidly. As the number of medical devices and electronics are growing to enhance human life, the challenges to make them safe, effective, and to find protection solutions for components are also increasing. For a number of years, conformal coatings have offered a level of protection to components, but many simply do not offer the level that is required for today and tomorrow's complex technologies.
This presentation will provide an overview of recent advances in Parylene technologies, including microRESIST® Antimicrobial Parylene Technology, and will discuss how currently available Parylenes differentiate themselves from other available conformal coating and polymeric materials. This presentation will address the latest advances in adhesion technologies and Parylene's role in nano- and micro- technologies. Examples of applications that have benefited from the properties of Parylene include circuit card assemblies, MEMS, LEDs, sensors, lab-on- a-chip devices, pacemakers, stents, electrosurgical tools, cochlear implants, neurostimulation devices and elastomers.
As applications and materials continue to evolve, Parylenes, used as conformal coatings as well as structural materials, enhance the performance and reliability of critical components and devices.
Speaker Bio: Dr. Rakesh Kumar is currently the Vice President of Technology for Specialty Coating Systems, Inc., overseeing Parylene R&D activities worldwide. With more than 27 years of extensive experience in polymeric materials, Dr. Kumar is currently involved with the application of Parylenes in the fields of medical devices, electronics, MEMS, sensors and nanotechnology. Dr. Kumar earned his doctoral degrees in Chemistry from India, and completed his post-doctorate work at the University College London, United Kingdom. He is co-author of a book and has authored several published papers and patents.
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Abstract:
The preparation of new polymers and nanomaterials require hierarchical levels of ordering and structuring: from molecular to macroscopic. The tools and methods available for evincing this order require design principles that start from non-covalent interactions all the way to object patterns that can be manipulated by non-lithographic methods. The ability to synthesize and fabricate new macromolecules and layered ordered systems result in new material stimuli-responsive properties. This talk will highlight the research philosophy and research methods used by our group to produce systems that include: 1) supramolecularly template knotty polymers, 2) electropolymerized molecularly imprinted sensors, 3) electronanopatterning, 4) colloidal nanosphere lithography, and, 5) multilayer shape-stimuli patterned objects and particles. What is also important is the use of surface sensitive spectroscopic and microscopic analytical tools applied rationally to highlight evidence of order and function.
Bio:
Rigoberto Advincula, Ph.D. is Professor at the Department of Macromolecular Science and Engineering, Case Western Reserve University in Cleveland, Ohio, USA. He is a Fellow of the American Chemical Society (ACS), Fellow of the Polymer Science and Engineering Division (ACS), Fellow of the Polymer Chemistry Division (ACS). He received the distinguished Herman Mark Scholar Award in 2013 and was elected to the World Economic Forum Future Materials Research Council in 2016. He served as past Chair of the Polymer Division, ACS. He is Editor of Reactive and Functional Polymers and recent Associate Editor of Polymer Reviews. His group does research in polymer materials, nanomaterials, colloidal science, 3D printing and ultrathin films towards applications from smart coatings to biomedical devices.
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Professor and Dean Jacobs School of Engineering University of California, San Diego
Albert (“Al”) P. Pisano was appointed as the Dean of Engineering at UC San Diego in September 2013. He held appointments at the University of California at Berkeley for 30 years, serving in a number of leadership positions. He was elected to the US National Academy of Engineering in 2001 and to Fellow status in the ASME in 2004. As the Dean of Engineering, he holds the Walter J. Zable Chair of Engineering, and is appointed as Distinguished Professor both in Mechanical and Aerospace Engineering as well as in Electrical and Computer Engineering. From 1997-1999, he served as Program Manager for MEMS at the Defense Advanced Research Projects Agency (DARPA) where he expanded the research portfolio to 83 contracts awarded nationwide with a total MEMS research expenditure in excess of $168 million over three fiscal years. Having graduated nearly 70 Ph.D. students and 75 MS students, he is an author of over 400 journal papers and 36 patents. He is a 10-time entrepreneur and his research interests include MEMS for a wide variety of applications, including harsh environment sensors systems and wearable sensors.
AlTSensors Techology: Research, Incubation and Education
404-894-3200
]]>Dr. Andrew Ferguson
Assistant ProfessorDepartment of Materials Science and EngineeringUniversity of Illinois at Urbana-ChampaignAbstract
Data-driven modeling and machine learning have opened new paradigms and opportunities in the understanding and design of soft and biological materials. Colloidal particles with tunable anisotropic surface interactions are of technological interest in fabricating soft responsive actuators, biomimetic polyhedral encapsulants, and substrates for high-density information storage. In the first part of this talk, I will describe our applications of nonlinear manifold learning to determine low-dimensional "assembly landscapes" from computer simulations and experimental particle tracking data for self-assembling patchy colloids. These landscapes connect colloid architecture and prevailing conditions with emergent assembly behavior, informing how to engineer the stability and accessibility of desired aggregates. Empirical models of viral fitness present a means to rationally design antiviral therapeutics by revealing vulnerabilities within the viral proteome. In the second part of this talk, I will discuss the translation of clinical sequence databases into spin glass models of viral fitness that reveal an interesting connection with statistical thermodynamics in which a data-driven fitness model of HIV admits an "error catastrophe" – mutational meltdown of the viral quasispecies induced by an elevated mutation rate – isomorphic to a first order phase transition. Our work informs new antiviral control strategies and provides a rationale for why HIV can live on the precipice of the error catastrophe with impunityand functions as a versatile and powerful method to create “designer” materials for various applications.
Biography
Andrew Ferguson is Assistant Professor of Materials Science and Engineering, and an Affiliated Assistant Professor of Chemical and Biomolecular Engineering, and Computational Science and Engineering at the University of Illinois at Urbana-Champaign. He received an M.Eng. in Chemical Engineering from Imperial College London in 2005, and a Ph.D. in Chemical and Biological Engineering from Princeton University in 2010. From 2010 to 2012 he was a Postdoctoral Fellow of the Ragon Institute of MGH, MIT, and Harvard in the Department of Chemical Engineering at MIT. He commenced his appointment at UIUC in August 2012. His research interests lie at the intersection of materials science, molecular simulation, and machine learning, with particular foci in the design of antiviral vaccines and self-assembling colloids and peptides. He is the recipient of a 2017 UIUC College of Engineering Dean's Award for Excellence in Research, 2016 AIChE CoMSEF Young Investigator Award for Modeling & Simulation, 2015 ACS OpenEye Outstanding Junior Faculty Award, 2014 NSF CAREER Award, 2014 ACS PRF Doctoral New Investigator, and was named the Institution of Chemical Engineers North America 2013 Young Chemical Engineer of the Year.
Reception at 3:30 p.m. in the GTMI Atrium
]]>Dr. Jeremy T. Busby
Materials Science and Technology Division, in the Physical Sciences Directorate
Oak Ridge National Laboratory
Abstract
The development of new materials and improved understanding of material performance are central to the adoption and deployment of virtually all innovation and technology in many fields, spanning transportation to energy, to medical and everything in between. However, material performance and degradation are complex issues and can be a limiting factor in the development and deployment of new concepts. For decades, understanding the limits of material performance and designing advanced materials tolerant their service environment has been performed primarily through an experimental Edisonian approach. Industry observations or operational experience have generated substantial testing matrices so develop materials data trends. While effective, this approach is often very time and cost intensive. A more efficient approach to understanding is required. The use of modern materials science provides that more efficient path to solving today’s materials problems. Modern materials and chemical science techniques must be employed to gain new understanding efficiently and cost effectively. This presentation will focus on ORNL’s application of integrated modern techniques (theory, modeling and simulation, and advanced characterization) for a wide range of materials problems, including automotive/transportation, energy production, and material reliability.
Biography
Dr. Busby is the Division Director for the Materials Science and Technology Division in the Physical Sciences Directorate at Oak Ridge National Laboratory. His contributions range from light water reactors to sodium reactors and space reactor systems as well as research in support of the ITER project. Dr. Busby’s research is focused on materials performance and development of materials for nuclear reactor applications. While at ORNL, Dr. Busby has participated in materials research efforts for space reactors, fusion machines, advanced fast reactors, and light water reactors. Ultimately, the results of this diverse research will enable the development of operating criteria for structural materials in a variety of adverse environments that will allow for design and operation of safe, reliable, and cost-effective nuclear systems. Dr. Busby was the lead for the Materials Aging and Degradation Pathway for the DOE –Office of Nuclear Energy Light Water Reactor Sustainability Research and Development program from 2009 to 2015. He also led the Nuclear Energy Enabling Technologies Materials Cross-cut effort, in addition to participation in several nuclear industry-sponsored research tasks. He is an Adjunct Assistant Professor of Nuclear Engineering and Radiological Sciences at the University of Michigan and has developed and taught his own graduate level course in materials degradation and performance for fission and fusion reactors. He also is heavily involved in the leadership of many professional society activities.
Reception at 3:30 p.m. in the GTMI Atrium
]]>Dr. Adil Mughal
Aberystwyth University
ABSTRACT
We study the optimal packing of hard spheres in an infinitely long cylinder [1-4]. Our simulations have yielded dozens of periodic, mechanically stable, structures as the ratio of the cylinder (D) to sphere (d) diameter is varied. Up to D/d=2.715 the densest structures are composed entirely of spheres which are in contact with the cylinder. The density reaches a maximum at discrete values of D/d when a maximum number of contacts are established. These maximal contact packings are of the classic "phyllotactic" type, familiar in biology. However, between these points we observe another type of packing, termed line-slip.
An analytic understanding of these rigid structures follows by recourse to a yet simpler problem: the packing of disks on a cylinder. We show that maximal contact packings correspond to the perfect wrapping of a honeycomb arrangement of disks around a cylindrical tube. While line-slip packings are inhomogeneous deformations of the honeycomb lattice modified to wrap around the cylinder (and have fewer contacts per sphere).
Beyond D/d=2.715 the structures are more complex, since they incorporate internal spheres, but an analysis in terms of contacts or constraints is still illuminating. We review some relevant experiments with hard spheres and small bubbles. We also discuss on-going and future areas of work related to this project.
ABOUT THE SPEAKER
Dr. Adil Mughal completed his undergraduate studies in theoretical physics at the University of Manchester, U.K. in 2002. Continuing his studies at the University of Manchester, Dr. Mughal pursued a PhD under the supervision of Professor Mike Moore.
Since 2010, Dr. Mughal has held the position of Lecturer in Mathematical Modeling at Aberystwyth University, U.K. as well as postdoctoral positions in Germany and Italy. His current research is focused on packing problem and the tole of topology & geometry in soft condensed matter physics.
Reception to follow
]]>(404) 894-9348
]]>hosted by
STAMI-Soft Matter Incubator (SMI)
The Soft Matter Lunch & Posters event welcomes researchers working in all areas of soft matter at Georgia Tech to participate and share your latest and greatest discoveries. There will be two concurrent poster sessions on anything squishy. A free lunch will be provided. All participants may present a poster (size limit 30” x 40”). Come network with fellow graduate students, post doctoral fellows and faculty while showcasing your exciting research! Registration is free but required.
Fee: No cost (lunch is provided)
Location: MoSE 2nd floor Atrium
Registration:
https://www.eventbrite.com/e/2017-soft-matter-lunch-posters-event-tickets-32588084839
Registration Deadline: April 12, 2017, 5:00 PM
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(404) 894-4040
]]>The competition is for current Georgia Tech students and recent alumni who have early stage product/service ideas or venture concepts that are geared towards creating a better world through students who Dare to Care. Entries might focus on reducing poverty, alleviating hunger, promoting health and wellness, improving air and water quality, reducing of the rate of depletion of natural resources, or developing alternate sources of energy … just to name a few!
Finalists will pitch their plan and answer questions about their idea/product to the public and judges from Atlanta's entrepreneurial community. Visitors and judges will have a chance to mingle with teams, review and question their projects, and then vote on cash prize winners. Prizes will be awarded to the Winner and Runner up, Best Poster, Video and People's Choice Award.
There will also be numerous raffle prizes, free King of Pops, and refreshments. This event is free and open to the public.
Visit our website or contact Dori Pap for more information.
]]>ABSTRACT
Ionic liquids are an emerging class of solvents with an appealing set of physical attributes. These include negligible vapor pressure, impressive chemical and thermal stability, tunable solvation properties, high ionic conductivity, and wide electrochemical windows. In particular, the non-volatility renders ionic liquids practical components of devices, but they require structure-directing agents to become functional materials. Block polymers provide a convenient platform for achieving desirable nanostructures by self-assembly, with lengthscales varying from a few nanometers up to several hundred nanometers. Furthermore, ionic liquids and polymer blocks can be selected to impart exquisitely tunable thermosensitivity, by exploiting either upper or lower critical solution transitions (UCSTs and LCSTs). In selected cases, it is also possible to prepare photoreversible and photopatternable systems. Overall, by combining designed block polymers and ionic liquids we have demonstrated materials with superior performance for a remarkably diverse set of applications. These include micelles for extraction, nanoreactors for catalysis, gate dielectrics in organic transistors, electrochromic and electroluminescent gels, and membranes for gas separation, ion batteries, and fuel cells.
ABOUT THE SPEAKER
Tim Lodge graduated from Harvard in 1975 with a B.A. cum laude in Applied Mathematics. He completed his PhD in Chemistry at the University of Wisconsin in 1980, and then spent 20 months as a National Research Council Postdoctoral Fellow at NIST. Since 1982 he has been on the Chemistry faculty at Minnesota, and in 1995 he also became a Professor of Chemical Engineering & Materials Science. In 2013 he was named a Regents Professor, the University’s highest academic rank. In 1994 he was named a Fellow of the American Physical Society (APS). He received the Arthur K. Doolittle Award from the PMSE Division of the American Chemical Society (ACS) in 1998, and in 2004 he received the APS Polymer Physics Prize. He was elected to Fellowship in the American Association for the Advancement of Science, and he received the International Scientist Award from the Society of Polymer Science, Japan, in 2009. He was the recipient of the ACS Prize in Polymer Chemistry, and was also elected a Fellow by the ACS, in 2010. In 2012 he received the Minnesota Award from the Minnesota Section of the ACS, and the Postbaccalaureate, Graduate and Professional Education Award from the University of Minnesota. He was honored with the Hermann Mark Award of the Division of Polymer Chemistry, ACS, in 2015, and in 2016 he was elected to the American Academy of Arts and Sciences. Since 2001 he has been the Editor of the ACS journal Macromolecules. In 2011 he became the founding Editor for ACS Macro Letters. He has served as Chair of the Division of Polymer Physics, APS (1997–8), and as Chair of the Gordon Research Conferences on Colloidal, Macromolecular and Polyelectrolyte Solutions (1998) and Polymer Physics (2000). Since 2005 he has been Director of the NSF-supported Materials Research Science & Engineering Center at Minnesota. He has authored or co-authored over 380 papers in the field of polymer science, and advised or co-advised over 80 PhD students. His research interests center on the structure and dynamics of polymer liquids, including solutions, melts, blends, and block copolymers, with particular emphases on self-assembling systems using rheological, scattering and microscopy techniques.
Reception to follow.
]]>In this seminar, Dr. Kristen H. Brosnan will give an overview of GE Global Research’s history of innovation, technical breadth, and organization. She will cover roles in innovation and transition to a GE product with specific technology transition examples from the Ceramic & Metallurgy organization, including Ceramic Matrix Composites (CMCs) for GE Aviation’s LEAP and GE9X gas turbines – the first implementation of ceramic components in the hot gas path of commercial aircraft engines, and Solid Oxide Fuel Cells (SOFCs) for our internal start-up, GE Fuel Cells.
Dr. Kristen H. Brosnan is the Manager of the Ceramics Laboratory at General Electric Global Research in Niskayuna, NY. She received her B.S. in Materials Science and Engineering from Georgia Institute of Technology in 1999. She received her M.S. and Ph.D. in Materials Science and Engineering, in 2002 and 2007, respectively, at The Pennsylvania State University.
Kristen has been with GE for nine years, starting as a materials scientist at GRC studying microstructure-properties-performance relationships in ceramic thermal spray coatings. Her team is delivering key ceramic technology for GE Power and GE Aviation gas turbines, including ceramic matrix composites for LEAP and GE9X Aviation engines, as well as solid oxide fuel cell technology for GE Fuel Cells. At General Electric, Kristen is also a featured science blogger for the GE Global Research external website http://geglobalresearch.com and co-leader of the GE Women’s Network-NY Capital District Hub, with over 1100 members. She has received numerous individual General Electric Global Recognition Awards for outstanding teamwork, technical excellence, expertise, volunteerism, external focus, and organizational citizenship. In 2013, her SOFC team won the General Electric Whitney Award for outstanding technical achievement.
In 2006, Kristen was a recipient of the Graduate Excellence in Materials Science (GEMS) Diamond Award given by the American Ceramic Society. Kristen is the recipient of the 2014 American Ceramic Society Du-Co Ceramics Young Professional Award and the 2014 Karl Schwartzwalder-Professional Achievement in Ceramic Engineering (PACE) Award. Kristen is past- president of the National Institute of Ceramic Engineers (NICE), a past-president of the Ceramic Educational Council (CEC), has served on the Editorial Advisory Board Member for the ACerS Bulletin and helped launch the Young Professionals Network for the American Ceramic Society in 2010.
Follow her on twitter @kristenbrosnan or connect on Linked In
Reception 3:30 pm GTMI/Callaway Atrium
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