Low-Energy Electron-Diffraction Intensity Analysis of a Surface Structure with Three CO Molecules in the Unit Cell, Rh(111)-(2 × 2)-3CO: Compact Adsorption in Simultaneous Bridge and Nonsymmetric Near-Top Sites
- 21 March 1983
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 50 (12), 903-906
- https://doi.org/10.1103/physrevlett.50.903
Abstract
The first low-energy electron-diffraction intensity analysis of the structure of molecules adsorbed at several different surface sites yields, for the compact Rh(111)-(2×2)-3CO structure, symmetric bridge sites and nonsymmetric near-top sites, which are separated by only ∼ 2.85 Å. CO molecules in near-top sites are shifted sideways by ∼ 0.5 Å from ideal top sites, but are tilted by less than 15° from the surface normal. These results support an antiphase domain model of high-coverage CO structures on metal surfaces in general.Keywords
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