The changes occurring at the CuPd{110}[85:15] surface accompanying the adsorption of oxygen at 323K were probed using forward scattering of Pd 3d5/2 photoelectrons in the {112} azimuth. It was shown that oxygen adsorption causes distinct changes in the short-range order of the surface, which were evidenced by changes in the polar-angle intensity plots obtained. The long-range symmetry of the surface showed no change. These changes were interpreted as the result of surface reconstruction to a missing row structure with no concurrent redistribution of Pd in the selvedge. This represents an observation of an adsorbate-induced reconstruction using angle-resolved photoelectron diffraction.

Evidence for an Adsorbate-Induced Reconstruction of an Alloy Surface from Angle-Resolved X-Ray Photoemission Spectroscopy. M.A.Newton, S.M.Francis, M.Bowker: Physical Review B, 1992, 45, 9451-4