时间：2014年07月02日(星期三)上午10:30
地点：2号楼303A室
报告题目: High-temperature Raman and Photoluminescence Study of Film – Substrate Interaction for 2D transition metal dichalcogenides
报 告 人: Prof. Yong Zhang，Electrical and Computer Engineering Department, University of North Carolina at Charlotte, USA
摘要： Monolayer transition metal dichalcogenides (TMDs) have been shown to exhibit various interesting properties that are generally considered to be intrinsic to the materials. However, the presumed 2D material is typically supported by a substrate. We use high temperature (from room temperature up to the decomposition temperature) Raman and photoluminescence to probe the interaction between the 2D-film and substrate, and find that the interaction is sensitive to not only the substrate type but also how the contact is formed (e.g., epitaxial growth vs. post-growth transfer). The findings suggest ways modify the properties of the 2D material by engineering the coupling with the substrate.
L. Q. Su et al., Nanoscale 6, 4920 (2014).
个人简介： Yong Zhang received B.S. and M.S. in Physics from Xiamen University, and Ph.D. in Physics from Dartmouth College. He is Bissell Distinguished Professor with ECE Dept of UNC-Charlotte since 2009, and adjunct Professor of Physics Dept..Prior to that, he was Senior Scientist with National Renewable Energy Laboratory (NREL). Other positions he has held include “Chaires d'excellence” of Nanosciences Foundation (France) 2010 – 2012; Academic Committee member, State Key Laboratory of Photovoltaic Science and Technology (China); Guest Professor, Institute of Semiconductors, CAS; etc. His current research activities include new materials and structures for photovoltaics (e.g., ZnO/ZnSe nano-heterostructures, CZTS, Perovskites), IR detector materials (e.g., InAs/GaSb SLs and MCT), inorganic-organic hybrid materials, graphene, graphene/Si heterostrutures, transition metal dichalcogenides, InGaN and AlGaN LED materials, and fundamental sciences in solid state physics. He has published more than 170 papers and book chapters.
He can be contacted at yong.zhang@uncc.edu.
Other information available at http://coefs.uncc.edu/yzhang47/ or google-scholar.
