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Revisiting the Structure of the p4 4 Surface Oxide on Ag(111) J. Schnadt,1

Summary: Revisiting the Structure of the p4 4 Surface Oxide on Ag(111)
J. Schnadt,1
A. Michaelides,2
J. Knudsen,1
R. T. Vang,1
K. Reuter,2
E. Lægsgaard,1
M. Scheffler,2
and F. Besenbacher1
Interdisciplinary Nanoscience Center and Department of Physics and Astronomy, University of Aarhus,
Ny Munkegade, 8000 Aarhus C, Denmark
Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
(Received 10 January 2006; published 10 April 2006)
Scanning tunneling microscopy (STM) and density-functional theory are used to reexamine the
structure of the renowned p4 4-O=Ag111 surface oxide. The accepted structural model [C. I.
Carlisle et al., Phys. Rev. Lett. 84, 3899 (2000)] is incompatible with the enhanced resolution of the
current STM measurements. An ``Ag6 model'' is proposed that is more stable than its predecessor and
accounts for the coexistence of the p4 4 and a novel c3 5


Source: Alavi, Ali - Department of Chemistry, University of Cambridge
Schnadt, Joachim - Department of Synchrotron Radiation Research, Lunds Universitet


Collections: Chemistry; Materials Science