The effect of underpotentially deposited Pb on the surface enhanced Raman scattering ability of polycrystalline Ag

A. L. Guy, B. Bergami, Jeanne E Pemberton

Research output: Contribution to journalArticle

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Abstract

The effect of submonolayer and monolayer amounts of Pb deposited at underpotential on a polycrystalline Ag electrode surface on the surface enhanced Raman scattering behavior of pyridine and Cl- adsorbates is presented. Surfaces covered by greater than 70% of a Pb monolayer do not support significant surface enhancement. The changes observed in SERS intensity as a function of fractional Pb coverage are interpreted in terms of changes in surface electronic properties and changes in adsorbate coverage. Evidence for changes in the structure of the Pb overlayer is also presented. Investigation of the reversibility of the SERS behavior after deposition and quantitative stripping of varying amounts of Pb provides information on the roles played by various sizes of surface roughness in SERS. These data suggest that both large scale and atomic scale roughness contribute to the SERS intensities measured in these systems.

Original languageEnglish (US)
Pages (from-to)226-244
Number of pages19
JournalSurface Science
Volume150
Issue number1
DOIs
StatePublished - Feb 1 1985

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Raman scattering
Raman spectra
Adsorbates
Monolayers
Surface roughness
stripping
Electronic properties
Pyridine
pyridines
surface roughness
roughness
Electrodes
electrodes
augmentation
electronics

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Condensed Matter Physics
  • Surfaces and Interfaces

Cite this

The effect of underpotentially deposited Pb on the surface enhanced Raman scattering ability of polycrystalline Ag. / Guy, A. L.; Bergami, B.; Pemberton, Jeanne E.

In: Surface Science, Vol. 150, No. 1, 01.02.1985, p. 226-244.

Research output: Contribution to journalArticle

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