Lattice Phonon Spectra of Aluminum Oxide Anodic Films

Autor: Chatelet, J., Claassen, H. H., Gruen, D. M., Sheft, I., Wright, R. B.
Zdroj: Applied Spectroscopy; March 1975, Vol. 29 Issue: 2 p185-189, 5p
Abstrakt: Techniques have been developed for obtaining reproducible lattice phonon spectra of barrier aluminum oxide anodic films. Changes in the lattice phonon spectrum as a result of 15-keV proton bombardment are interpreted in terms of the formation of Al-OH bonds. Polarization spectra of stripped and unstripped aluminum oxide films confirm the findings of Vedder and Vermilyea, particularly with respect to the origin of the 960 cm−1band. The close similarity in the observed and calculated band shapes (using the theory of Berreman) leave little doubt that the 960 cm−1absorption is due to a longitudinal optic mode of the aluminum oxide lattice.
Databáze: Supplemental Index