Abstract

A normal-incidence technique is described for obtaining IR absorption spectra of molecular layers adsorbed on a dielectric thin-film surface. In the experiment described, a low-power CO2 laser beam is scanned across a molecular layer of 2-propanol adsorbed on a ZnSe film. Spectra for 1–5 monolayer coverages are compared with the liquid spectrum of the adsorbate.

© 1983 Optical Society of America

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