Theory of Raman scattering by molecules adsorbed on electrode surfaces

Frederick W. King, Richard P. Van Duyne, George C Schatz

Research output: Contribution to journalArticle

226 Citations (Scopus)

Abstract

In this work, we provide a simple classical model to explain the enormous intensity enhancement observed for Raman scattering from molecules adsorbed on electrode surfaces. It is proposed that the origin of the intensity enhancement arises from very large changes in the polarizability derivative with respect to a normal coordinate, by virtue of the image field at the admolecule. A qualitative discussion of the role of adsorbed counter ions is presented. We tentatively propose that the dependence of the intensity enhancement on counter ion concentration may be understood in terms of nearest neighbor dipole-dipole stabilization of surface clusters of counter ions with the adsorbate molecule. We also discuss some limitations of the classical model, and propose some further experiments that may lead to clarification of the ideas presented in this work.

Original languageEnglish
Pages (from-to)4472-4481
Number of pages10
JournalJournal of Chemical Physics
Volume69
Issue number10
Publication statusPublished - 1978

Fingerprint

Radiation counters
Raman scattering
counters
Raman spectra
Electrodes
Molecules
electrodes
augmentation
dipoles
molecules
Adsorbates
ion concentration
ions
Stabilization
stabilization
Derivatives
Experiments

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Theory of Raman scattering by molecules adsorbed on electrode surfaces. / King, Frederick W.; Van Duyne, Richard P.; Schatz, George C.

In: Journal of Chemical Physics, Vol. 69, No. 10, 1978, p. 4472-4481.

Research output: Contribution to journalArticle

King, Frederick W. ; Van Duyne, Richard P. ; Schatz, George C. / Theory of Raman scattering by molecules adsorbed on electrode surfaces. In: Journal of Chemical Physics. 1978 ; Vol. 69, No. 10. pp. 4472-4481.
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