213081 event 1368628774 1475892210 <![CDATA[Nano@TECH: August 27: Eric Vogel, Georgia Tech School of Materials Science & Engineering: Fabrication, Characterization, and Modeling of Silicon-on-Insulator Field-Effect-Transistor Nanoribbon Biosensors]]> Speaker for August 27: Eric Vogel, Georgia Tech School of Materials Science & Engineering

Nano@Tech

Sharing Our Knowledge, Shaping the Future

Nano@Tech is an organization comprised of professors, graduate students and undergraduate students from the Georgia Tech and Emory campuses and professionals from the corresponding scientific community who are interested in Nanotechnology. Meetings are held on the second and fourth Tuesday of the month at noon, during the academic year. Each meeting is held in the Marcus Nanotechnology Building conference rooms (rooms 1116-1118).


Nano@Tech Fall 2013 Schedule:
Augsut 27: Eric M. Vogel, Georgia Institute of Technology, School of Materials Science and Engineering

September 10: Hang Chen, Georgia Tech Institute of Electronics and Nanotechnology
September 24: Tina Salguero, University of Georgia, Department of Chemistry
October 11 (Friday): Jeff Davis, Georgia Tech School of Electrical and Computer Engineering
October 22: Gerhard Klimeck, Purdue University, School of Electrical and Computer Engineering
November 12: Students TBA, Georgia Tech
December 10: Sven Behrens, Georgia Tech School of Chemical & Biomolecular

 

]]> For over 30 years, field effect transistors (FETs) have been used as sensors. In the past, Ion-Sensitive-FETs (ISFET) were based on bulk Metal-Oxide-Semiconductor (MOS) FET designs and the device was gated by biasing the electrolyte through the reference electrode. Recently, functionalized silicon nanowires and silicon-on-insulator (SOI) devices have been introduced for their greater sensitivity in detecting proteins, DNA and even single viruses. This work focuses on a variety of issues that impact the properties of SOI FET nanoribbon sensors.  The ability to
stabilize and control the attachment of cells on the sensor surface is critical. Therefore, the reliability and reproducibility of self-assembled-monolayers such as aminosilanes will be presented. Biological solutions consist of protein or DNA in an electrolytic solution containing salt ions. Some of these ions, such as Na, have long been known to cause instabilities in MOS devices. The effect of mobile ions on SOI-based sensors will be presented. The SOI-based sensor structure results in the electrolyte voltage being capacitively coupled to the back gate voltage. The impact of this coupling on sensor response will be described. Physically realistic SPICE models were developed and illustrate the response of both pH and biosensors with a multi-gate model. The model demonstrates good agreement to experimental data including the impact of Debye screening and site binding charge.

]]> 213031 image <![CDATA[Nano@TECH]]> 196982 image/jpeg 213021 image <![CDATA[Nano@TECH]]> 196981 image/jpeg 213051 image <![CDATA[Nano@TECH0]]> 196984 image/jpeg 213041 image <![CDATA[Nano@TECH2]]> 196983 image/jpeg Dr. David Gottfried

david.gottfried@ien.gatech.edu

]]> <![CDATA[]]> 1271 197261 1795 66411