Chaudhuri A, Lerotholi T J, Jackson D C, Woodruff D P, Dhanak V
Physics Department, University of Warwick, Coventry CV4 7AL, UK.
Phys Rev Lett. 2009 Mar 27;102(12):126101. doi: 10.1103/PhysRevLett.102.126101. Epub 2009 Mar 26.
The local adsorption structure of methylthiolate in the ordered Au(111)-(sqrt[3]xsqrt[3])R30 degrees phase has been investigated using core-level-shift measurements of the surface and bulk components of the Au 4f(7/2) photoelectron binding energy. The amplitude ratio of the core-level-shift components associated with surface Au atoms that are, and are not, bonded to the thiolate is found to be compatible only with the previously proposed Au-adatom-monothiolate moiety in which the thiolate is bonded atop Au adatoms in hollow sites, and not on an unreconstructed surface, or in Au-adatom-dithiolate species.
利用金4f(7/2)光电子结合能的表面和体相成分的芯能级位移测量，研究了甲硫醇盐在有序的Au(111)-(√3×√3)R30°相中的局域吸附结构。发现与键合和未键合硫醇盐的表面金原子相关的芯能级位移成分的幅度比，仅与先前提出的金吸附原子-单硫醇盐部分兼容，其中硫醇盐键合在中空位点的金吸附原子顶部，而不是在未重构的表面上，也不是在金吸附原子-二硫醇盐物种中。
