Detection of Low Concentrations of a Colored Adsorbate at Silver by Surface-Enhanced and Resonance-Enhanced Raman Spectrometry

Jeanne E. Pemberton, Richard P. Buck

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The surface-enhanced Raman scattering (SERS) and resonance Raman scattering (RRS) enhancement mechanisms have been exploited In obtaining surface Raman spectra from the adsorbed anion of dlthizone (diphenylthiocarbazone) at a silver electrode surface at -0.20 V (vs, Ag/AgCI) In pH 12 aqueous alkaline buffer solution. SERS+RRS spectra with acceptable signal-to-noise ratios were acquired from solutions initially 10-2 M through 10-9 M In dlthizone anion. The SERS+RRS-detected adsorption isotherm is presented. Calculations of surface population based on the suggested orientation of dlthizone anion at the silver surface allow a mlnimumi SERS enhancement factor of 2 X 103 to be estimated for this system.

Original languageEnglish (US)
Pages (from-to)2263-2267
Number of pages5
JournalAnalytical chemistry
Issue number14
StatePublished - Dec 1981


ASJC Scopus subject areas

  • Analytical Chemistry

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