报告题目 | Towards a comprehensive model of Surface Enhanced Raman Scattering (SERS) |
报告时间 | 2014年3月24日下午10：00 |
报告地点 | 合肥微尺度物质科学国家实验室9004教室 |
报告摘要 |
(1) a simple introduction , (2) the main points of the enhancemen by the local electromagnetic field (EM) at spherical silver particles. (3)the experimental evidence for SERS active sites of atomic dimensions . The average signal from the SERS active sites(SAS) mimics a non-genuine" first layer effect” which is often interpreted as “Chemical effect". (4) The SAS are quenched by oxygen, therefore plasmonic enhancers in air are pure EM enhancers . (5) This allows the quantitative experimental separation of the EM and “chemical” enhancement for different kinds of silver samples. (6) If the surface concentration of SAS is known the extra enhancement at SAS can be evaluated.(7) The extra enhancement is caused by transient electron transfer metal-adsorbate.(8) charge transfer calculations at clusters covered by one adsorbed molecule may be considered as models of SAS.
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报告人 | Prof. Andreas Otto，University of Düsseldorf |
报告人简介：[1]现在工作单位及职称 [2]主要研究方向 [3]学术成就简述（100字以内）
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参加者：所有感兴趣的老师和学生 | |
联系人：陈艳霞 | |