Auger electron spectroscopy studies of clean polycrystalline gold and of the adsorption of mercury on gold
- 1 January 1973
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Journal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
- Vol. 69, 1242-1250
- https://doi.org/10.1039/f19736901242
Abstract
Auger spectra of clean polycrystalline gold have been determined in a cylindrical velocity analyzer at a resolution of 0.6%. The assignment of the Auger transitions is discussed. The energy distribution curve, N(E) is obtained from the experimental d(E×N(E))/dE curve and the secondary electron background substracted in the region of the N6VV, N7VV doublet. Deconvolution of this region was performed on a Dupont curve resolver into four separate peaks and the two larger peaks assigned to the Auger transitions N7VV and N6VV. The width of each peak is ∼ 3.2 eV which compares with a value predicted from the known band structure of gold of greater than 10 eV; apparently only a part of the valence band is available for Auger emission. The adsorption of mercury on the clean gold surface is examined at 300 K and the initial sticking probability is shown to be close to unity, falling rapidly when the coverage exceeds 4.6 × 1014 atoms cm–2. Heating the gold to ∼ 450 K in vacuum removed all the Auger features associated with Hg.Keywords
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