Polarization-modulation FTIR spectroscopy of self-assembled monolayers and multilayers at metal surfaces

Robert M. Corn

doi:10.1117/12.166607

31 January 1994 Polarization-modulation FTIR spectroscopy of self-assembled monolayers and multilayers at metal surfaces

Robert M. Corn

Author Affiliations +

Proceedings Volume 2089, 9th International Conference on Fourier Transform Spectroscopy; (1994) https://doi.org/10.1117/12.166607
Event: Fourier Transform Spectroscopy: Ninth International Conference, 1993, Calgary, Canada

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.

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Robert M. Corn "Polarization-modulation FTIR spectroscopy of self-assembled monolayers and multilayers at metal surfaces", Proc. SPIE 2089, 9th International Conference on Fourier Transform Spectroscopy, (31 January 1994); https://doi.org/10.1117/12.166607

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