Differential Reflectance Spectroscopy and SERS of Mildly Roughened Silver Electrodes

Mark A. Bryant; Jeanne E. Pemberton

doi:10.1021/la00094a006

Differential Reflectance Spectroscopy and SERS of Mildly Roughened Silver Electrodes

Mark A. Bryant, Jeanne E. Pemberton

Research output: Contribution to journal › Article › peer-review

17 Scopus citations

Abstract

Differential reflectance spectroscopy has been used to measure the reflectivity of electrochemically roughened Ag electrodes in 0.1 M KC1 and 0.1 M KC1/0.05 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 language	English (US)
Pages (from-to)	751-758
Number of pages	8
Journal	Langmuir
Volume	6
Issue number	4
DOIs	https://doi.org/10.1021/la00094a006
State	Published - 1990

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Surfaces and Interfaces
Spectroscopy
Electrochemistry

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title = "Differential Reflectance Spectroscopy and SERS of Mildly Roughened Silver Electrodes",

abstract = "Differential reflectance spectroscopy has been used to measure the reflectivity of electrochemically roughened Ag electrodes in 0.1 M KC1 and 0.1 M KC1/0.05 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.",

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T1 - Differential Reflectance Spectroscopy and SERS of Mildly Roughened Silver Electrodes

AU - Bryant, Mark A.

AU - Pemberton, Jeanne E.

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N2 - Differential reflectance spectroscopy has been used to measure the reflectivity of electrochemically roughened Ag electrodes in 0.1 M KC1 and 0.1 M KC1/0.05 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.

AB - Differential reflectance spectroscopy has been used to measure the reflectivity of electrochemically roughened Ag electrodes in 0.1 M KC1 and 0.1 M KC1/0.05 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.

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Differential Reflectance Spectroscopy and SERS of Mildly Roughened Silver Electrodes

Abstract

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