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- W2021005713 abstract "In a previous publication the image enhancement effect and the enhanced radiation due to near field excitation of surface roughness were calculated for a finite-size molecule above a metal described by a nonlocal dielectric relation [Phys. Rev. Letters 44 (1980) 1774]. When applied to a roughened Ag surface these calculations led to a predicted Surface Enhanced Raman Scattering (SERS) gain of ~ 103 due to each effect, yielding an overall gain ~ 106, in agreement with experiment. Here these calculations are extended to the case of a liquid Hg surface, the roughness corresponding to thermally excited ripplons. The SERS gain due to image enhancement is reduced to ~ 10, due primarily to the ~ 24 times greater electron scattering rate in Hg over that in Ag. The roughness gain is reduced to ~ 2 at room temperature, due to the difference between the ripplon spectrum and that of the boss-like surface structures assumed for the solid surface. The predicted overall SERS gain for Hg is ~ 20, far less than reported in recent observations [R. Naanan et al., J. Phys. Chem. 84 (1980) 2692]. The discrepancy raises serious questions about the electromagnetic explanations of SERS." @default.
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- W2021005713 date "1981-09-01" @default.
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- W2021005713 title "Electromagnetic effects in the Surface Enhanced Raman Scattering from a molecule at a liquid Hg surface" @default.
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- W2021005713 doi "https://doi.org/10.1016/0039-6028(81)90577-x" @default.
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