SERS from Adsorbed Molecules on Metal Surfaces
Several key questions to distinguish between various microscopic models for surface enhanced Raman scattering (SERS) are discussed. Most experimental results stress the importance of bonding between adsorbates and metal and the influence of surface roughness, which can be well explained with mechanisms involving electron-hole pair excitations. The coupling mechanism to the adsorbed molecules could not be unambigeously identified up to now. It has to explain the strong intensity cariation of SERS from certain substrates and the change of Raman selection rules.
KeywordsMetal Surface Strongly Enhance Raman Scattering Adsorb Molecule Strongly Enhance Raman Scattering Spectrum Surface Plasmon Excitation
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