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Optica Publishing Group
  • Applied Spectroscopy
  • Vol. 36,
  • Issue 1,
  • pp. 69-71
  • (1982)

Characterization of Vapor-deposited Silver Films Exhibiting Surface-enhanced Raman Scattering by Raman and X-ray Photoelectron Spectroscopy

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Abstract

The observation of a 10<sup>6</sup>-fold increase in the Raman scattering cross section of pyridine adsorbed onto roughened silver electrodes or onto thin silver films has focused interest on Raman spectroscopy as a tool for surface analysis. Since the original observation of surface-enhanced Raman scattering (SERS) of pyridine, SERS has been observed for a variety of admolecules on silver including cyanide,. thiocyanate, and carbon monoxide. Many of these spectra exhibit prominent Raman peaks at 1380 and 1590 cm<sup>−1</sup>, and weaker features at 2925 cm<sup>−1</sup>. Howard <i>et al</i>. have suggested that this background spectrum is necessary for SERS, yet its origin is uncertain, having been attributed to surface carbonates and graphitic carbon.

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