光电工程学院2015年学术报告之十四—基于硫族铜化合物的等离子特性胶体纳米晶的尺寸调节、形状、构成和光学特性

发表于 2015-05-19 08:47

英文题目：Plasmonic Copper Chalcogenide-based Colloidal Nanocrystals with Tunable Size, Shape, Composition, and Optical Properties

中文题目：基于硫族铜化合物的等离子特性胶体纳米晶的尺寸调节、形状、构成和光学特性

时间：2015.5.21（周四）下午3：30-5：00

地点：光电工程学院三楼多功能厅

报告人：Mark T. Swihart  教授（美国纽约州立大学Buffalo分校）

主持人： 许改霞  教授

摘要：Over the past few yours, our group has focussed substantial effort on the solution-phase synthesis of transition metal chalcogenide nanostructures, particularly those containing copper. Significantly copper-deficient, and therefore heavily p-doped, members of this family have been of great recent interest due to the observation of localized surface plasmon resonance (LSPR) in them, mediated by the high concentration of free holes. In recent work, we have produced Cu2-xS, Cu2-xSe, Cu2-xS1-ySey,hybrid Au/Cu2-xSe, and Au2S/Cu2-xS, CuxInySz, CuxSnyS, CuxSnySe, PbxSnyS,  SnS, and SnSe. In addition to controlling the stoichiometry in these binary and ternary systems, we are in many cases able to control the nanoparticle size, crystal phase, and morphology to produce structures with unique combinations of properties. In this talk, we will introduce these results and discuss the commonalities and differences within this class of materials. Our Cu2-xSe and Au/Cu2-xSe nanoparticles have shown great promise for use as contrast agents for photoacoustic imaging and as sensitizers for photothermal therapy. We have also employed them in chemical sensing. We will present our work on these emerging applications and discuss future directions in research on plasmonic semiconductors in nanomedicine. Finally, many of these nanostructures can be cast into thin films and incorporated into functional optoelectronic devices. Of course, the family of copper-based chalcogenide semiconductors includes CIGS, CZTS, and other promising materials for thin-film photovoltaics. The broad tunability of composition, phase, size, shape, band-gap, and doping-level provided by colloidal synthesis can open up new opportunities inlow-cost solution-processed thin film optoelectronic devices.

 报告人简历：Mark T. Swihart earned a B.S. in Chemical Engineering from Rice University in 1992, and a Ph.D. in Chemical Engineering in 1997 from the University of Minnesota, followed by one year as a post-doctoral researcher in the Particle Technology Laboratory in the Department of Mechanical Engineering at the University of Minnesota. Professor Swihart joined the faculty of Chemical and Biological Engineering at the University at Buffalo (SUNY) in 1998, and has been a full professor since 2008. In 2014 he was named a UB Distinguished Professor.He also serves as Executive Director of the New York State Center of Excellence in Materials Informatics. His current research interests include synthesis, processing, and applications of inorganic nanoparticles and other nanomaterials. He has co-authored more than 150 peer-reviewed journal papers, which have been cited more than 6500 times (Google Scholar, h-index 44). Dr. Swihart is a recipient of the Kenneth Whitby award from the American Association for Aerosol Research, the Schoellkopf medal from the Western New York section of the American Chemical Society, and the J.B. Wagner award from the Electrochemical Society, as well as several university awards for research, teaching, and mentoring of undergraduate researchers. Swihart currently serves as an editor for Aerosol Science and Technology, and on the Board of Consulting Editors of AIChE Journal. He has served as research advisor to over fifty current and former M.S. and Ph.D. students and more than ninety undergraduate researchers at UB.