title: Local methylthiolate adsorption geometry on Au(111) from photoemission core-level shifts.
abstract: 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.
authors.affiliation: Physics Department, University of Warwick, Coventry CV4 7AL, UK.
authors.forename: A
authors.initials: A
authors.lastname: Chaudhuri
authors.forename: T J
authors.initials: TJ
authors.lastname: Lerotholi
authors.forename: D C
authors.initials: DC
authors.lastname: Jackson
authors.forename: D P
authors.initials: DP
authors.lastname: Woodruff
authors.forename: V
authors.initials: V
authors.lastname: Dhanak