{"673994":{"#nid":"673994","#data":{"type":"event","title":"MS Defense by Botyo Dimitrov","body":[{"value":"\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cstrong\u003E\u003Cspan\u003EBotyo Dimitrov\u003C\/span\u003E\u003C\/strong\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E(Advisor: Prof. Vladimir Tsukruk)\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003Ewill defend a Master\u2019s thesis entitled\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cstrong\u003E\u003Cspan\u003E3D Printed Cellulose Nanocrystals-based Photonic Films with Periodic Circular Dichroism and Infra-Red Reflectance\u003C\/span\u003E\u003C\/strong\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003EOn\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003EMonday, April 15 at 9:00 a.m.\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003EMoSE Room 3201A\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cstrong\u003E\u003Cspan\u003EAbstract \u003C\/span\u003E\u003C\/strong\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003EDaylight management has an increasing importance due to ongoing efforts to reduce energy consumption. Current commercially available absorption-based technologies affect the visible range of the spectrum and near-infrared (NIR) reflecting materials, including chiral nematic liquid crystals, are achieved by crosslinking stabilization of synthetic organic mesogens. It is of interest to develop a material that has good visible transmittance, limits NIR interior irradiation, and is based on abundant and renewable sources manufactured via an accessible method. Additionally, there is a growing demand for materials with engineered circular dichroism for various applications sensitive to circularly polarized light. In this work, two distinct cases of top-down structured photonic films were investigated. First, twisted helical cellulose nanocrystal (CNC) films with dual chiroptical NIR reflectance properties are produced via a facile blade coating 3D printing method. The films show both left and right-handed (LH, RH) chiroptical reflectance\/transmittance properties, as opposed to natural homochiral CNC films. It is demonstrated that by manipulation of the process parameters of discrete twisted helical organization\u2013 twisting angle and anisotropic block thickness \u2013 distinct circular dichroism patterns and transmittance could be achieved. It is further shown the produced films could be treated as a hybrid between two extremes \u2013 a 1D photonic crystal and a traditional chiral film, exhibiting respectively reflectance and circular dichroism peaks, to yield a pre-programmed material with dual chiroptical properties as well as an achiral film with NIR reflectance. Second, a 1D Photonic crystal with vivid structural coloration based on alternating CNC and MXene (MX) phases was produced and studied. The films show strong optical properties with only 4 bilayer repetitions with an overall film thickness around 1 um. Partial transparency and pronounced reflectance in the visible range was observed. Different coloration is achieved by changing the period step resulting in blue to orange films. The 1D photonic crystals with a conductive MX phase hold the potential for electrochromics, and the 2D nature of the MX flakes open possibilities for tuning the reflective and emissive properties for advanced radiative cooling and filtration applications. \u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cstrong\u003E\u003Cspan\u003ECommittee \u003C\/span\u003E\u003C\/strong\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u2022 Prof. Vladimir Tsukruk \u2013 School of Engineering (advisor) \u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u2022 Prof. Meisha Shofner \u2013 School of Engineering \u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u2022 Prof. Wenshan Cai \u2013 School of Engineering\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n","summary":"","format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cspan\u003E\u003Cstrong\u003E\u003Cspan\u003E3D Printed Cellulose Nanocrystals-based Photonic Films with Periodic Circular Dichroism and Infra-Red Reflectance\u003C\/span\u003E\u003C\/strong\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/span\u003E\u003C\/p\u003E\r\n","format":"limited_html"}],"field_summary_sentence":[{"value":"3D Printed Cellulose Nanocrystals-based Photonic Films with Periodic Circular Dichroism and Infra-Red Reflectance"}],"uid":"27707","created_gmt":"2024-04-04 15:38:22","changed_gmt":"2024-04-04 15:38:53","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2024-04-15T09:00:00-04:00","event_time_end":"2024-04-15T11:00:00-04:00","event_time_end_last":"2024-04-15T11:00:00-04:00","gmt_time_start":"2024-04-15 13:00:00","gmt_time_end":"2024-04-15 15:00:00","gmt_time_end_last":"2024-04-15 15:00:00","rrule":null,"timezone":"America\/New_York"},"location":"MoSE Room 3201A","extras":[],"groups":[{"id":"221981","name":"Graduate Studies"}],"categories":[],"keywords":[{"id":"111531","name":"ms defense"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1788","name":"Other\/Miscellaneous"}],"invited_audience":[{"id":"78771","name":"Public"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}