Time Dependence of Surface Enhanced Raman Scattering at Silver in the Presence of Underpotentially Deposited Lead and Its Implications for the Roles of Surface Roughness

Anita L. Guy, Jeanne E. Pemberton

Research output: Contribution to journalArticle

18 Scopus citations

Abstract

The recovery of the surface enhanced Raman scattering response for pyridine and Cl-adsorbed to roughened polycrystalline Ag substrates upon controlled deposition and quantitative stripping of underpotentially deposited Pb is presented. Recovery data are presented for both adsorbate vibrational features as a function of Pb coverage between 0.0 and 1.4 monolayers. The time dependence of the recovery behavior at potentials corresponding to 0.2, 0.5, and 1.0 fractional Pb monolayer is also presented. The onset of SERS irreversibility is correlated with current-time transients for Pb overlayer formation. Loss of SERS recovery after the deposition and stripping of greater than ca. 0.7 fractional Pb monolayer and at times during monolayer deposition is discussed in terms of structural rearrangements of the Pb overlayer which result in an irreversible loss of atomic-scale roughness features.

Original languageEnglish (US)
Pages (from-to)518-525
Number of pages8
JournalLangmuir
Volume1
Issue number4
DOIs
StatePublished - Jul 1985

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

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