A. I. Stadnichenko, S. V. Koshcheyev, A. I. Boronin
of the Polycrystalline Gold Foil Surfaces and X-Ray Photoelectronic
Spectroscopy Study of Oxygen States in Oxide Layers
work the gold oxide layers, produced on the surface of polycrystalline gold
foil,were studied by means of X-ray photoelectron spectroscopy (XPS).
Using method of O2 high frequency activation the effective formation of 3-5 nm oxide films
were formed. From the analysis of Au4f spectra the main state of gold on the
surface was found to be in the oxidation power 3+. Curve fitting analysis of O1s line showed the
existence of 4 individual components characterizing different nonequivalent
oxygen states in the oxide layers. It is proposed that two main oxygen species
529.0 eV and 530.0 eV) can be related to oxygen atoms in two- and three -
dimensional gold oxide phase. Two other oxygen species characterized by
elevated values of binding energy (Eb(O1s) = 531.8 eV and 535.2 eV) are attributed
to oxygen consisting of the peroxide and superoxide groups, respectively.
Copyright (C) Chemistry Dept., Moscow State University, 2002