报告题目：IRRAS on Metal Oxide Single Crystals: Molecular Vibrations and Beyond
报告人：Prof. Dr. Christof Woell, Karlsruhe Institute of Technology (KIT), Germany
邀请人：徐明春教授
报告时间：8月5日 (星期五) 9:30
报告地点：知新楼C座702：量子报告厅
摘要：
Recently, a novel Infrared Reflection Absorption Spectroscopy (IRRAS) has emerged as a very powerful tool for characterizing molecular adsorbates on metal oxide surfaces in spite of the low reflectivity in the infrared regime.
In this talk we will present the first IRRAS data for two important oxides, ZnO and CeO2. For the case of ZnO we will demonstrate for two adsorbates, CO and CO2, that IRRAS studies on oxide samples allow for a direct experimental determination of the adsorbate geometry by using s- and p-polarized light as well as different incident directions. In the case of CeO2(111) single crystals, we will show that also on this surface CO can be used as a probe molecule to determine vacancy concentrations and to find reaction intermediates after exposing CeO2(111) to CH3OH. Finally, we will discuss thin ZnO-layers grown on brass (Cu/Zn: 9:1) single crystals with a new structural arrangement.
报告人简介
Prof. Woell studied physics at the University of Göttingen and received his PhD in 1987 at the Max-Planck-Institut of Dynamics and Self-Organization with Prof. Peter Toennies. After his habilitation he took over the chair for Physical Chemistry at the University of Bochum until 2009. Since 2009 he is the director of Institite of Functional Interfaces at the Karlsruhe Institute of Technology.
He is the spokeperson of the Surface Physics Division of the German Physical Society since 2016. He is a member of the Council on Physical Chemistry of solid-State Bodies, Surfaces, and Characterization of Materials of the German Science Foundation (DFG) (2016 unti 2019). He got the van't Hoff Prize of the German Bunsen Association (DGB) 2016.
He has more than 400 peer-reviewed publications and 10000 citations without self-citations.
