Chlorine Adsorption on Au(111): Chlorine Overlayer or Surface Chloride?
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- 作者：Weiwei Gao ; Thomas A. Baker ; Ling Zhou ; Dilini S. Pinnaduwage ; Efthimios Kaxiras ; Cynthia M. Friend
- 刊名：Journal of the American Chemical Society
- 出版年：2008
- 出版时间：March 19, 2008
- 年：2008
- 卷：130
- 期：11
- 页码：3560 - 3565
- 全文大小：400K
- 年卷期：v.130,no.11(March 19, 2008)
- ISSN：1520-5126
文摘
We report the first scanning tunneling microscope (STM) investigation, combined with densityfunctional theory calculations, to resolve controversy regarding the bonding and structure of chlorineadsorbed on Au(111). STM experiments are carried out at 120 K to overcome instability caused by mobilespecies upon chlorine adsorption at room temperature. Chlorine adsorption initially lifts the herringbonereconstruction. At low coverages (<0.33 ML), chlorine binds to the top of Au(111)-(1 × 1) surface andleads to formation of an overlayer with (
× 
)R30
structure at 0.33 ML. At higher coverages, packingchlorine into an overlayer structure is no longer favored. Gold atoms incorporate into a complex superlatticeof a Au-Cl surface compound.
× )R30 structure at 0.33 ML. At higher coverages, packingchlorine into an overlayer structure is no longer favored. Gold atoms incorporate into a complex superlatticeof a Au-Cl surface compound.