Mix of Molecular Adsorption Sites Detected for Disordered CO on Pt(111) by Diffuse Low-Energy Electron Diffraction
- 14 November 1988
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 61 (20) , 2352-2355
- https://doi.org/10.1103/physrevlett.61.2352
Abstract
Complete local-bonding geometries in a disordered molecular overlayer have been determined for the first time, together with the relative occupation of different coexisting adsorption sites. Diffuse-LEED intensities were measured with a new, highly sensitive, low-noise, digital-LEED detector, and calculated with an extension of the efficient beam-set-neglect theory. At one-third of a monolayer of carbon monoxide on Pt(111) at 160 K, (88 ± 5)% of the molecules are found to occupy top sites and (12 ± 5)% bridge sites, with bond lengths consistent with earlier results for ordered layers.Keywords
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