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Proceedings Paper

Polarization-modulation FTIR spectroscopy of self-assembled monolayers and multilayers at metal surfaces
Author(s): Robert M. Corn
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Paper Abstract

The technique of polarization modulation Fourier transform infrared (PM-FTIR) spectroscopy is used to obtain grazing incident angle differential reflectance spectra of molecular monolayers and multilayers adsorbed onto gold substrates. These spectra are obtained by the photoelastic modulation of the FTIR beam polarization and a novel real-time sampling methodology that generates the average and differential FTIR interferograms from measurements of the infrared signal during each modulation cycle. In comparison with conventional electronics which utilize a lock-in amplifier, the real-time electronics permit the operation of the FTIR spectrometer at normal mirror velocities, and without the need for a background spectrum. We have applied PM-FTIR spectroscopy to study of the modification of alkanethiol monolayers via amide and ester formation reactions.

Paper Details

Date Published: 31 January 1994
PDF: 7 pages
Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); doi: 10.1117/12.166607
Show Author Affiliations
Robert M. Corn, Univ. of Wisconsin/Madison (United States)

Published in SPIE Proceedings Vol. 2089:
9th International Conference on Fourier Transform Spectroscopy
John E. Bertie; Hal Wieser, Editor(s)

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