Chlorine Adsorption on Au(111): Chlorine Overlayer or Surface Chloride?
Journal of the American Chemical Society2008Vol. 130(11), pp. 3560–3565
Citations Over TimeTop 10% of 2008 papers
Abstract
We report the first scanning tunneling microscope (STM) investigation, combined with density functional theory calculations, to resolve controversy regarding the bonding and structure of chlorine adsorbed on Au(111). STM experiments are carried out at 120 K to overcome instability caused by mobile species upon chlorine adsorption at room temperature. Chlorine adsorption initially lifts the herringbone reconstruction. At low coverages (<0.33 ML), chlorine binds to the top of Au(111)-(1 × 1) surface and leads to formation of an overlayer with (×)R30° structure at 0.33 ML. At higher coverages, packing chlorine into an overlayer structure is no longer favored. Gold atoms incorporate into a complex superlattice of a Au−Cl surface compound.
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