Axial ratio distribution effect of isolated microspheroids on the surface enhanced Raman scattering

The observed thickness dependence and excitation profiles of the surface-enhanced resonance Raman scattering (SERRS) from crystal violet (CV) on silver films demonstrated the importance of surface roughness and chemical effects. Using different normalization schemes in studying the excitation profile of SERRS we were able to identify that there are three multiplicative contributions to the observed overall enhancement, viz. the electromagnetic effect, the molecular resonance effect and the charge-transfer effect originating from the strong electronic interactions between CV and the metal islands.

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Enhancement of resonance Raman scattering from crystal violet deposited on island silver films

Chou

Liang

Tse

1986

J Raman Spectroscopy

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Contributions of r−1, r−2, r−3 terms of the full dipole fields associated with Raman scattering enhancement from CN molecules adsorbed on a 2-D array of Ag spheroids

Chu

Wang

1985

Journal of Applied Physics

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The enhancement of Raman scattering from a CN molecule adsorbed on the tip of one of a 2-D array of Ag spheroids has been newly calculated using the full dipole fields. Results are compared to the corresponding experimental data from the lithographically produced Ag microspheroids. While the r−1 term is small in our specific configuration of molecule-spheroids arrangement, the r−2 term of the full dipole fields is found to contribute about the same amount to the excitation profile of the Raman enhancement as the conventional r−3 term. We also find a kind of spectral fluctuation in the Raman excitation profile and have demonstrated it as due to the interference between the r−2 and r−3 fields.

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Simple treatment of the enhancement of Raman scattering due to a two-dimensional array of metallic spheroids

Chu

Wang

1985

Phys. Rev. B

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Axial ratio distribution effect of isolated microspheroids on the surface enhanced Raman scattering

Cited by 5 publications

References 12 publications

Enhancement of resonance Raman scattering from crystal violet deposited on island silver films

Enhancement of resonance Raman scattering from crystal violet deposited on island silver films

Contributions of r−1, r−2, r−3 terms of the full dipole fields associated with Raman scattering enhancement from CN molecules adsorbed on a 2-D array of Ag spheroids

Simple treatment of the enhancement of Raman scattering due to a two-dimensional array of metallic spheroids

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