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Local methylthiolate adsorption geometry on Au(111) from photoemission core-level shifts

By Anindita Chaudhuri, T. J. Lerotholi, D. C. Jackson, D. P. Woodruff and Vin Dhanak


The local adsorption structure of methylthiolate in the ordered Au(111)-(√3×√3)R30° phase has been investigated using core-level-shift measurements of the surface and bulk components of the Au 4f7/2 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

Topics: QC
Publisher: American Physical Society
Year: 2009
OAI identifier:

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