The following is an abstract for the selected article. A PDF download of the full text of this article is available here. Members may download full texts at no charge. Non-members may be charged a small fee for certain articles.
Infrared Multiple Specular Reflectance of Mono- and Submonomolecular Layers of p-Bromobenzoic Acid on Oxidized Metals
Volume 43, Number 1 (Jan. 1989) Page 107-113
Sondag, A.H.M.; Raas, M.C.
The advantages of Multiple Specular Reflection (MSR) over single reflection grazing incidence infrared spectroscopy are discussed in this paper. A calculation which incorporates the experimental constraints for a multiple reflection setup is performed. The results concerning the angular dependence are confirmed by experiment. The main advantages are a wide angular acceptance and a release of the grazing angle of incidence geometry. Approximately the same sensitivity can be obtained as is theoretically possible with a single reflection at grazing incidence. However, in practice a somewhat higher sensitivity can be obtained with multiple specular reflectance spectroscopy. The sensitivity is illustrated by the measurement of submonolayers of p-bromobenzoic acid chemisorbed on an oxidized aluminium flat surface. Comparison with neutron activation analysis data shows that the reflection-absorption intensities are proportional to the surface coverage. A dependence of spectral features on surface coverage can be observed.