Photacoustic Fourier Transform Infrared (FTIR) Spectroscopy

K. Krishnan; S. L. Hill; H. Witek; J. Knecht

doi:10.1117/12.932137

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29 October 1981 Photacoustic Fourier Transform Infrared (FTIR) Spectroscopy

K. Krishnan, S. L. Hill, H. Witek, J. Knecht

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Proceedings Volume 0289, 1981 Intl Conf on Fourier Transform Infrared Spectroscopy; (1981) https://doi.org/10.1117/12.932137
Event: 1981 International Conference on Fourier Transform Infrared Spectroscopy, 1981, Columbia, United States

Abstract

Photoacoustic FT-IR spectra recorded using a new photoacoustic cell are described. The study of the photoacoustic spectra of cast films of Plexiglas of different thicknesses shows that the depth of penetration of the FT-IR photoacoustic experiments is of the order of a few micrometers and that photoacoustic saturation effects play a key role in the qualitative appearance of the spectra. These differences can be misinterpreted as due to structural changes in different layers of the sample.

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K. Krishnan, S. L. Hill, H. Witek, and J. Knecht "Photacoustic Fourier Transform Infrared (FTIR) Spectroscopy", Proc. SPIE 0289, 1981 Intl Conf on Fourier Transform Infrared Spectroscopy, (29 October 1981); https://doi.org/10.1117/12.932137

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