{"656430":{"#nid":"656430","#data":{"type":"event","title":"MS Defense by Kellina Pierce","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003ETHE SCHOOL OF MATERIALS SCIENCE AND ENGINEERING\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EGEORGIA INSTITUTE OF TECHNOLOGY\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EUnder the provisions of the regulations for the degree\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMASTER OF SCIENCE\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Eon Friday, March 25, 2022\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E4:00 PM\u003C\/strong\u003E\u003Cbr \/\u003E\r\n\u003Cstrong\u003Ein MoSE 1201A\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u0026amp; via\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EBlueJeans Video Conferencing\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Ca href=\u0022https:\/\/bluejeans.com\/737732388\/6399\u0022\u003Ehttps:\/\/bluejeans.com\/737732388\/6399\u003C\/a\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Ewill be held the\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMASTER\u0026rsquo;S THESIS DEFENSE\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003Efor\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EKellina Pierce\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003E\u0026quot;Capillary and Localized Magnetic Effects in Cellulose Nanocrystal Thin Films\u0026quot;\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003ECommittee Members:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Ca name=\u0022_Hlk54306819\u0022\u003E\u003Cstrong\u003EProf. Vladimir V. Tsukruk, Advisor, MSE\u003C\/strong\u003E\u003C\/a\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Ca name=\u0022_Hlk53967710\u0022\u003E\u003Cstrong\u003EProf. Zhiqun Lin, MSE\u003C\/strong\u003E\u003C\/a\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EDhriti Nepal, Ph.D., Air Force Research Lab\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EMike McConney, Ph.D., Air Force Research Lab\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u003Cstrong\u003EAbstract:\u003C\/strong\u003E\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EBioderived materials such as cellulose nanocrystals (CNCs) have inherent structural organization that can be exploited for the control of dimensionality, periodicity, and functionality of biocompatible and photonic materials. However, precise control and tunability of organized cellulose nanocrystal-based materials is challenging due to the random organization of the chiral nematic structure, called tactoids, during evaporation induced self-assembly (EISA) of solid films. Lack of fundamental assessment of CNC-centric materials has limited applications for the sustainable, bioderived material since control over its fundamental behavior orients the entire understanding for the chiroptic potential of those materials. This work focuses on the control of lyotropic LC alignment of CNCs by (i) utilizing geometric confinement for asymmetric evaporation that induces directional flow of LC suspension, (ii) direct chemical modification of the surface groups for control of inter-particle interactions, and (iii) applying magnetic fields for localized CNC alignments and global patterned formation.\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EFirstly, we utilized tunicate-inspired hydrogen-bonding-rich 3,4,5-trihydroxyphenethylamine hydrochloride (TOPA) for physical crosslinking of nanocrystals and polyethylene glycol (PEG) as a relaxer of internal stresses in the vicinity of the capillary surface.\u0026nbsp; The CNC\/TOPA\/PEG film is organized as a left-handed chiral structure parallel to flat walls, and the inner volume of the films displayed transitional herringbone organization across the interfacial region. Secondly, we utilized polyethyleneimine (PEI) coated Fe\u003Csub\u003E3\u003C\/sub\u003EO\u003Csub\u003E4\u003C\/sub\u003E magnetic nanoparticles to produce localized magnetic patterns in CNC thin films under weak magnetic fields. The resulting CNC films showed tailored optical patterns controlled by localized magnetic patterns while retaining a iridescent optical appearance.\u003C\/p\u003E\r\n\r\n\u003Cp\u003E\u0026nbsp;\u003C\/p\u003E\r\n\r\n\u003Cp\u003EThe significance of this work being that the tuning and control over the materials\u0026rsquo; magnetic properties allows for a bottom-up approach towards a controlled assembly of larger scale materials with localized pattens. Overall, this work advances the dynamic control over CNC films to widen the range of applications available for multi-stimuli response, biocompatible films and gels of interest in biosensing and tunable optical reflectors.\u003C\/p\u003E\r\n","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":"","field_summary_sentence":[{"value":"\u0022Capillary and Localized Magnetic Effects in Cellulose Nanocrystal Thin Films\u0022"}],"uid":"27707","created_gmt":"2022-03-17 13:46:25","changed_gmt":"2022-03-17 13:46:25","author":"Tatianna Richardson","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2022-03-25T17:00:00-04:00","event_time_end":"2022-03-25T19:00:00-04:00","event_time_end_last":"2022-03-25T19:00:00-04:00","gmt_time_start":"2022-03-25 21:00:00","gmt_time_end":"2022-03-25 23:00:00","gmt_time_end_last":"2022-03-25 23:00:00","rrule":null,"timezone":"America\/New_York"},"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":"78761","name":"Faculty\/Staff"},{"id":"78771","name":"Public"},{"id":"78751","name":"Undergraduate students"}],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[],"email":[],"slides":[],"orientation":[],"userdata":""}}}