Differential reflectance spectroscopy and SERS of mildly roughened silver electrodes

Mark A. Bryant, Jeanne E Pemberton

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Differential reflectance spectroscopy has been used to measure the reflectivity of electrochemically roughened Ag electrodes in 0.1 M KCl and 0.1 M KCl/0.05 M pyridine. The electrodes were subjected to varying anodic current densities in double-potential-step oxidation-reduction cycles. A correlation exists in both systems between SERS intensities for both v(Ag-Cl) and pyridine ring breathing vibrations and the magnitude of the decrease in reflectivity. Surfaces that exhibit the greatest decrease in reflectivity exhibit the greatest SERS intensity. Scanning electron microscopy is used to characterize surface morphology. The reflectivity spectra are interpreted in terms of absorption by large-scale Ag roughness features. The correlation between decrease in reflectivity and increased SERS intensity is proposed to be due to electromagnetic enhancement effects.

Original languageEnglish (US)
Pages (from-to)751-758
Number of pages8
JournalLangmuir
Volume6
Issue number4
StatePublished - 1990

Fingerprint

Silver
silver
Spectroscopy
reflectance
Electrodes
electrodes
spectroscopy
Pyridine
pyridines
breathing vibration
Surface morphology
Current density
roughness
Surface roughness
current density
electromagnetism
Scanning electron microscopy
oxidation
cycles
scanning electron microscopy

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Differential reflectance spectroscopy and SERS of mildly roughened silver electrodes. / Bryant, Mark A.; Pemberton, Jeanne E.

In: Langmuir, Vol. 6, No. 4, 1990, p. 751-758.

Research output: Contribution to journalArticle

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