Xe monolayer adsorption on Ag(111) I. Structural properties

P. I. Cohen, J. Unguris, M. B. Webb

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The monolayer of adsorbed xenon on the ({A figure is presented}1) surface of silver was studied using low- energy electron diffraction. The structure is an hexagonal lattice aligned with but out of registry with the substrate. The Xe-Xe spacing at 25 K is 4.44 ± 0.01 Å in the full monolayer and 4.47 ± at less than full coverage. The Xe-Ag spacing is 3.5 ± 0.1 Å. Here 〈u2 T, the meansquare vibrational amplitude normal to the surface divided by the temperature is (1.83 ± 0.4 × 10-4 A2/K. The heat of adsorption is 0.28 ± 0.03 eV/atom.

Original languageEnglish (US)
Pages (from-to)429-456
Number of pages28
JournalSurface Science
Issue number2
StatePublished - 1976

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