CONTRIBUTIONS OF ATOMIC-SCALE ROUGHNESS AND ADSORBATE COVERAGE TO THE QUENCHING OF THE SERS RESPONSE AT LEAD-MODIFIED SILVER ELECTRODES.

Anita L. Guy, Jeanne E Pemberton

Research output: Contribution to journalArticle

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Abstract

This report details a series of experiments and calculations designed to provide a more complete analysis of the factors which may contribute to the quenching of the SERS response at Pb-modified Ag electrodes. SERS intensity-Pb coverage profiles are presented for the pyridine ring-breathing vibration after the majority of atomic-scale roughness features are destroyed by Pb monolayer deposition. Comparison of the morphology of the intensity-coverage profiles obtained during and after the loss of atomic-scale roughness indicates that loss of the majority of atomic-scale roughness during Pb deposition cannot fully account for the observed quenching of the SERS response. The SERS response of 3, 6-dihydroxypyridazine (DHPZN) is examined in order to evaluate the impact of adsorbate coverage on the observed quenching behavior. X-ray photoelectron spectroscopic studies of DHPZN adsorbed at Ag and Pb-modified Ag electrodes indicate that changes in the adsorbate surface coverage during Pb deposition do not contribute significantly to the quenching of the SERS response.

Original languageEnglish (US)
Pages (from-to)125-132
Number of pages8
JournalLangmuir
Volume3
Issue number1
StatePublished - Jan 1987

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Adsorbates
Silver
Quenching
roughness
Lead
Surface roughness
quenching
silver
Electrodes
electrodes
breathing vibration
profiles
Photoelectrons
Pyridine
Monolayers
pyridines
photoelectrons
X rays
rings
x rays

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

CONTRIBUTIONS OF ATOMIC-SCALE ROUGHNESS AND ADSORBATE COVERAGE TO THE QUENCHING OF THE SERS RESPONSE AT LEAD-MODIFIED SILVER ELECTRODES. / Guy, Anita L.; Pemberton, Jeanne E.

In: Langmuir, Vol. 3, No. 1, 01.1987, p. 125-132.

Research output: Contribution to journalArticle

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