title: Electrocompression of the Au(111) surface layer during Au electrodeposition.
abstract: In situ grazing-incidence x-ray diffraction studies of reconstructed Au(111) electrodes in aqueous electrolyte solutions are presented, which reveal a significantly increased compression of the Au surface layer during Au electrodeposition as compared to Au(111) surfaces under ultrahigh vacuum conditions or in the Au-free electrolyte. The compression increases towards more negative potentials, reaching 5.3% at the most negative potentials studied. It may be explained within a simple thermodynamic model by a release of potential-induced surface stress.
authors.affiliation: Institut für Experimentelle und Angewandte Physik, Universität Kiel, Olshausenstrasse 40, 24098 Kiel, Germany.
authors.forename: A H
authors.initials: AH
authors.lastname: Ayyad
authors.forename: J
authors.initials: J
authors.lastname: Stettner
authors.forename: O M
authors.initials: OM
authors.lastname: Magnussen