报告题目 Synthesis, Structure, Property Relationships for Transparent Conducting Films of Metal Nanowires 报告时间 2014年5月21日上午10:00 报告地点 环境资源楼报告厅 报告人 Benjamin J. Wiley Assistant Professor Department of Chemistry, Duke University 报告摘要： There is an ongoing drive to replace the most common transparent conductor, indium tin oxide (ITO), with a material that gives comparable performance, but can be coated from solution at speeds orders of magnitude faster than the sputtering processes used to deposit ITO. Metals nanowires are currently the only alternative to ITO that meets these requirements. This presentation will start with a discussion of structure-property studies that show one of the key parameters that determine the properties of transparent conducting films is the aspect ratio of the metal nanowires. Modeling results have motivated the development of a new synthesis that produces copper nanowires with aspect ratios as high as 5700 in 30 min. These nanowires were coated from solution to create films with a specular transmittance >95%T at a sheet resistance of <100 Ω sq-1, performance that is comparable to that of ITO. Copper nanowire networks plated with Ni can serve as the transprent anode in organic solar cells that exhibit device efficienies of 5%, comparable to values obtained for devices made with Ag nanowires. Copper nanowire networks can also serve as transparent, compliant electrodes for dielectric elastomer actuators, or as transparent water oxidation/reduction catalysts for photoelectrochemical cells. 报告人简介： Ben started at the University of Minnesota as a major in Chinese, but quickly switched to Chemical Engineering and received his B.S. in 2003. Ben received his Ph.D. in Chemical Engineering in 2007 after studying the synthesis and properties of silver nanostructures with Younan Xia in the department of chemistry at the University of Washington in Seattle. His work on silver nanowires was licensed to Cambrios, which is currently marketing silver nanowire based touch-screens. Ben subsequently worked as a postdoctoral fellow in the lab of George Whitesides in the department of chemistry at Harvard University, primarily focusing on paper diagnostics, plasmonics, and nanoskiving. Ben started as an Assistant Professor in the Department of Chemistry at Duke University in 2009. His work focuses on the production, properties, and applications of metal nanostructures. To date he has published 66 papers with over 7700 citations, has 5 patent applications, and an NSF CAREER award. He co-founded NanoForge Corp. in 2010 to commercialize his work with copper-based nanowires. 主办单位：化学与材料科学学院 邀请人：熊宇杰教授