{"56208":{"#nid":"56208","#data":{"type":"event","title":"ChBE Spring2007 Seminar Series","body":[{"value":"\u003Cp\u003EThomas F. Kuech, the Milton J. and A. Maude Shoemaker Professor in the Department of Chemical and Biological Engineering at the University of Wisconsin-Madison presents \u003Cem\u003EChemical, Thermodynamic, and Strain Effects in the GaAsSb\u003C\/em\u003E as part of ChBE\u0027s spring seminar series.\n\u003C\/p\u003E\n\u003Cp\u003E* Refreshments will be served at 3:30 PM in the Lower Level 1 Gossage Atrium\u003Cbr \/\u003E\n* Lecture commences at 4:00 PM in L1255 in the Ford ES\u0026amp;T Building\n\u003C\/p\u003E\n\u003Cp\u003ESeminar Abstract\u003Cbr \/\u003E\nGaAs-based multiple quantum well heterostructures comprised of metastable alloys, such as\u003Cbr \/\u003E\nGaAs1-ySby - GaAs1-zNz, have been recently studied due to their projected broad applications.\u003Cbr \/\u003E\nThese materials have potential for realizing high-performance, reduced temperature-sensitivity\u003Cbr \/\u003E\nlasers in the 1.55 \u0026#956;m wavelength region for telecommunications as well as much longer\u003Cbr \/\u003E\nwavelengths useful in sensing applications. These materials are also interesting since they exhibit extensive miscibility gaps which can prevent the formation of a homogenous alloy over the\u003Cbr \/\u003E\nentire range of desired material compositions. The interaction of strain, surface segregation and\u003Cbr \/\u003E\ndefect formation energies can alter this range of miscibility. Additionally, specific changes in the\u003Cbr \/\u003E\ngrowth chemistry of these materials can interact with these physical and thermodynamic factors\u003Cbr \/\u003E\nto alter the achievable alloy compositions and enable new device applications. The chemical\u003Cbr \/\u003E\nformation through vapor phase processes of such materials and their device applications will be\u003Cbr \/\u003E\npresented. The impact of surface chemistry on the alloy composition will be discussed along\u003Cbr \/\u003E\nwith extensions to other important materials systems.\u003C\/p\u003E","summary":null,"format":"limited_html"}],"field_subtitle":"","field_summary":[{"value":"Thomas F. Kuech presents \u003Cem\u003EChemical, Thermodynamic, and Strain Effects in the GaAsSb\u003C\/em\u003E as part of ChBE\u0027s spring seminar series.","format":"limited_html"}],"field_summary_sentence":[{"value":"Thomas F. Kuech presents seminar"}],"uid":"27255","created_gmt":"2010-05-20 11:47:14","changed_gmt":"2016-10-08 01:51:37","author":"Josie Giles","boilerplate_text":"","field_publication":"","field_article_url":"","field_event_time":{"event_time_start":"2007-04-11T17:00:00-04:00","event_time_end":"2007-04-11T18:00:00-04:00","event_time_end_last":"2007-04-11T18:00:00-04:00","gmt_time_start":"2007-04-11 21:00:00","gmt_time_end":"2007-04-11 22:00:00","gmt_time_end_last":"2007-04-11 22:00:00","rrule":null,"timezone":"America\/New_York"},"extras":[],"groups":[{"id":"1240","name":"School of Chemical and Biomolecular Engineering"}],"categories":[],"keywords":[{"id":"1303","name":"chbe"},{"id":"1704","name":"chemical \u0026 biomolecular engineering"},{"id":"2437","name":"lecture"},{"id":"166896","name":"seminar"}],"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\u003EJosie Giles\u003C\/strong\u003E\u003Cbr \/\u003ESchool of Chemical \u0026amp; Biomolecular Engineering\u003Cbr \/\u003E\u003Ca href=\u0022http:\/\/www.gatech.edu\/contact\/index.html?id=jg234\u0022\u003EContact Josie Giles\u003C\/a\u003E\u003Cbr \/\u003E\u003Cstrong\u003E404-385-2299\u003C\/strong\u003E","format":"limited_html"}],"email":[],"slides":[],"orientation":[],"userdata":""}}}