{"92421":{"#nid":"92421","#data":{"type":"event","title":"(09-1001) Prof. Andrew Lyon, Georgia Tech","body":[{"value":"\u003Cp\u003EProf. Andrew Lyon, Georgia Tech\n\u003C\/p\u003E\n\u003Cp\u003ESmoothing Out the Defects with Polymer Microspheres\n\u003C\/p\u003E\n\u003Cp\u003EThis talk will discuss various aspects of the defect tolerance, self-healing, and geometry adaptation properties of hydrogel microspheres. Hydrogel microspheres (microgels) are micron- to submicron-sized particles, each composed of a cross-linked network of water soluble polymer. As a result of their large water content, which can easily exceed 99% by volume, microgels composed of flexible polymers such as poly(alkylacrylamides) have a high degree of conformational flexibility; they are exceedingly soft structures. We have found that this softness permits microgels to be extremely adaptive to geometric restrictions, resulting in defect-tolerant colloidal crystals where large \u0022dopant\u0022 particles are assimilated into the lattice seamlessly. This adaptive nature is also illustrated by the passage of microgels through orifices at least 10-fold smaller than the equilibrium microgel diameter, which is potentially relevant in the use of microgels for injectable drug delivery formulations. Finally, the use of microgels in self-healing polymer films will be discussed, along with illustrations of the applicability of such films in reconstructive surgery.\n\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Prof. Andrew Lyon, Georgia Tech\n\nSmoothing Out the Defects with Polymer Microspheres","format":"limited_html"}],"field_summary_sentence":[{"value":"Prof. Andrew Lyon, Georgia Tech"}],"uid":"27275","created_gmt":"2009-01-12 01:00:00","changed_gmt":"2016-10-08 01:57:16","author":"Shirley Tomes","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2009-10-01T16:00:00-04:00","event_time_end":"2009-10-01T17:00:00-04:00","event_time_end_last":"2009-10-01T17:00:00-04:00","gmt_time_start":"2009-10-01 20:00:00","gmt_time_end":"2009-10-01 21:00:00","gmt_time_end_last":"2009-10-01 21:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"related_links":[{"url":"http:\/\/www.chemistry.gatech.edu\/faculty\/Lyon\/","title":"Andrew Lyon"}],"groups":[{"id":"85951","name":"School of Chemistry and Biochemistry"}],"categories":[],"keywords":[{"id":"1809","name":"physical chemistry"}],"core_research_areas":[],"news_room_topics":[],"event_categories":[{"id":"1795","name":"Seminar\/Lecture\/Colloquium"}],"invited_audience":[],"affiliations":[],"classification":[],"areas_of_expertise":[],"news_and_recent_appearances":[],"phone":[],"contact":[{"value":"\u003Cstrong\u003EShirley Tomes\u003C\/strong\u003E\u003Cbr \/\u003EChemistry \u0026amp; Biochemistry\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=st81\u0022\u003EContact Shirley Tomes\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404-894-0591\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}