{"74541":{"#nid":"74541","#data":{"type":"event","title":"MRSEC Seminar Series with Dr. Mark Hersam","body":[{"value":"\u003Cp\u003E\u003Cstrong\u003EMRSEC SEMINAR SERIES WITH DR. MARK HERSAM\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EThe\u0026nbsp;first MRSEC Seminar of the Spring 2012 semester will be held on Thursday, January 26, 2012 at 3pm in the\u0026nbsp;Microelectronics Research Center, Room 102 located on the first floor of the\u0026nbsp;building.\u0026nbsp; We are pleased to welcome Dr. Mark Hersam, Northwestern University\u0026nbsp;as our speaker.\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003E\u003Cstrong\u003EBelow is an abstract:\u003C\/strong\u003E\u003C\/p\u003E\u003Cp\u003ECarbon nanomaterials have attracted significant attention due to their potential to improve applications such as transistors, transparent conductors, solar cells, batteries, and biosensors.\u0026nbsp; This talk will highlight our latest efforts to develop strategies for purifying, functionalizing, and assembling carbon nanomaterials into functional devices.\u0026nbsp; For example, we have recently developed and commercialized a scalable technique for sorting surfactant-encapsulated single-walled carbon nanotubes (SWCNTs) by their physical and electronic structure using density gradient ultracentrifugation (DGU).\u0026nbsp; The resulting monodisperse SWCNTs enhance the performance of thin film transistors, infrared optoelectronic devices, photovoltaics, catalysts, and transparent conductors.\u0026nbsp; The DGU technique also enables multi-walled carbon nanotubes to be sorted by the number of walls and solution phase graphene to be sorted by thickness, thus expanding the suite of monodisperse carbon nanomaterials.\u0026nbsp; By extending our DGU efforts to carbon nanotubes and graphene dispersed in biocompatible polymers (e.g., DNA, Pluronics, Tetronics, etc.), new opportunities have emerged for monodisperse carbon nanomaterials in biomedical applications.\u003C\/p\u003E\u003Cp\u003EIn addition to these solution-phase approaches, this talk will also discuss vacuum compatible methods for functionalizing the surfaces of carbon nanomaterials.\u0026nbsp; For example, a suite of perylene-based molecules form highly ordered self-assembled monolayers (SAMs) on graphene via gas-phase deposition in ultra-high vacuum.\u0026nbsp; Due to their noncovalent bonding, these SAMs preserve the superlative electronic properties of the underlying graphene while providing uniform and tailorable chemical functionality.\u0026nbsp; In this manner, disparate materials (e.g., high-k gate dielectrics) can be seamlessly integrated with graphene, thus enabling the fabrication of capacitors, transistors, and related electronic\/excitonic devices.\u0026nbsp; Alternatively, via aryl diazaonium chemistry, functional polymers can be covalently grafted to graphene.\u0026nbsp; In addition to presenting opportunities for graphene-based chemical and biological sensing, covalent grafting allows local tuning of the electronic properties of the underlying graphene. \u003Ca href=\u0022http:\/\/www.hersam-group.northwestern.edu\/\u0022\u003E\u003Cstrong\u003Ehttp:\/\/www.hersam-group.northwestern.edu\/\u003C\/strong\u003E\u003C\/a\u003E\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"\u003Cp\u003EThe\u0026nbsp;first MRSEC Seminar of the Spring 2012 semester will be held on Thursday, January 26, 2012 at 3pm in the\u0026nbsp;Microelectronics Research Center, Room 102 located on the first floor of the\u0026nbsp;building.\u0026nbsp; We are pleased to welcome Dr. Mark Hersam, Northwestern University\u0026nbsp;as our speaker.\u0026nbsp; His talk is titled: Chemically Refined Carbon Nanomaterials\u003C\/p\u003E","format":"limited_html"}],"field_summary_sentence":[{"value":"The focus of the seminar is, \u0022Chemically Refined Carbon Nanomaterials\u0022"}],"uid":"27428","created_gmt":"2011-12-16 15:31:01","changed_gmt":"2016-10-08 01:56:53","author":"Gina Adams","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2012-01-26T14:00:00-05:00","event_time_end":"2012-01-26T15:00:00-05:00","event_time_end_last":"2012-01-26T15:00:00-05:00","gmt_time_start":"2012-01-26 19:00:00","gmt_time_end":"2012-01-26 20:00:00","gmt_time_end_last":"2012-01-26 20:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"related_links":[{"url":"http:\/\/www.mrsec.gatech.edu\/","title":"Materials Research Science and Engineering Center"}],"groups":[{"id":"60783","name":"MRSEC"}],"categories":[],"keywords":[{"id":"15601","name":"carbon nanomaterials"},{"id":"429","name":"graphene"}],"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":"\u003Cp\u003EGina Adams\u003C\/p\u003E\u003Cp\u003EMRSEC Program Manager\u003C\/p\u003E\u003Cp\u003E\u003Ca href=\u0022mailto:gina.adams@mrsec.gatech.edu\u0022\u003Egina.adams@mrsec.gatech.edu\u003C\/a\u003E\u003C\/p\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}