STM Observation of Pt{111}(3¡¿3)-Cl and c(4¡¿2)-Cl Structures

Bulletin of the Korean chemical society

M.-B. Song¹  M. Ito¹ 

关键词: STM;    Platinum;    Chlorine.;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

The adsorption of chlorine on a Pt(111) surface at 90 K has been studied using scanning tunneling microscopy (STM) in ultra-high vacuum environments. The adsorbed chlorine atoms give rise to two different ordered structures, (3�?3)-Cl and c(4�?2)-Cl, depending on the coverage. It has been determined from the STM image that the absolute coverage of (3�?3)-Cl structure is 0.44, which is not in agreement with coverage calibrated by a low energy electron diffraction technique together with an Auger electron spectrometer and a thermal desorption spectrometer. The Cl atoms bound to on-top sites at the Pt(111)(3�?3)-Cl surface appeared to effectively perturb the density of states of Pt atoms, as compared with that bound to bridging sites. The other ordered structure, c(4�?2)-Cl, with small domain sizes, consists of both on-top and bridge-bonded species with a saturation coverage of 0.5.

【 授权许可】

Unknown