拉曼散射
拉曼光谱
吸附
等离子体子
激发
分子
纳米晶
激发波长
材料科学
半导体
表面增强拉曼光谱
光谱学
波长
化学
纳米技术
光化学
分析化学(期刊)
光电子学
物理化学
光学
有机化学
物理
量子力学
作者
Yanfei Wang,Weidong Ruan,Junhu Zhang,Bai Yang,Weiqing Xu,Bing Zhao,John R. Lombardi
摘要
Abstract We have been able to observe the surface‐enhanced Raman scattering (SERS) from 4‐mercaptopyridine (4‐Mpy) molecules adsorbed on ZnO nanocrystals, which display 10 3 enhancement factors (EFs). An excitation wavelength‐dependent behavior is clearly observed. Another molecule BVPP is also observed to have surface‐enhanced Raman signals. The chemical enhancement is most likely responsible for the observed enhancement, since plasmon resonances are ruled out. The research is important not only for a better understanding of the SERS mechanism, but also for extension of the application of Raman spectroscopy to a variety of adsorption problems on a semiconductor surface. Copyright © 2009 John Wiley & Sons, Ltd.
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