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科学研究

学术报告-Heavy-Metal Free Colloidal Semiconductor

发表时间:2019-03-13   浏览次数:79

报告题目:Heavy-Metal Free Colloidal Semiconductor Nanocrystals: Synthesis, Self-assembly and Applications

报告人:夹国华(Curtin Institute of Functional Molecules and Interfaces, School of Molecular and Life Sciences, Curtin University, Perth 6102, Australia; guohua.jia@curtin.edu.au

报告时间:2019326日(星期二),下午200-300

报告地点:南区物理光电楼1110

报告人简介:夹国华博士于2009年获香港城市大学博士学位,2010-2014年在以色列希伯来大学Uri Banin教授课题组从事博士后研究,现任澳大利亚科廷大学ARC DECRA研究员、独立PI。主要从事胶体半导体量子点的可控制备与组装及其在发光显示、催化、光()子器件等领域应用的研究。到目前为止,共主持澳大利亚研究理事会项目等 3 项,总经费 100多万澳元;以第一作者/通讯作者身份在Nat. Mater. J. Am. Chem. Soc.Adv. Mater.等国际知名期刊上共发表学术论文40余篇,论文累计被引用次数超过2100次,H指数27,有2项美国专利(1项已授权和1PCT)。

报告摘要Semiconductor nanocrystals manifest fascinating size, composition and shape dependent optical and electronic properties. A first aspect aims at electron-hole recombination yielding emissive quantum rods, with relevance for a wide range of technological applications. In this context we will discuss various synthesis routes for shape controlled semiconductor nanorods and report the self-assembly strategy that leading to unprecedented structures. A second aspect aims at electron-hole charge separation and utilization for photo- electrochemical-catalytic redox reactions. This is realized in alloyed nanorods spontaneously formed by alkylthiol etching. The alloyed nanorods have highly active Zn sites on the (100) surface and reduced energy barrier for water oxidation, resulting in enhanced oxygen evolution reaction activity in water splitting and improved photoelectrochemical activities, and thus open a pathway for converting solar energy to chemical energy stored in a fuel using earth abundant and eco-friendly catalysts


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