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Experimental and theoretical study of oxygen adsorption structures on Ag(111) Joachim Schnadt,1,2,* Jan Knudsen,2 Xiao Liang Hu,3 Angelos Michaelides,3,4 Ronnie T. Vang,2 Karsten Reuter,4
 

Summary: Experimental and theoretical study of oxygen adsorption structures on Ag(111)
Joachim Schnadt,1,2,* Jan Knudsen,2 Xiao Liang Hu,3 Angelos Michaelides,3,4 Ronnie T. Vang,2 Karsten Reuter,4
Zheshen Li,5 Erik Lægsgaard,2 Matthias Scheffler,4 and Flemming Besenbacher2,
1Division of Synchrotron Radiation Research, Department of Physics, Lund University, Box 118, 221 00 Lund, Sweden
2Interdisciplinary Nanoscience Center (iNANO) and Department of Physics and Astronomy, University of Aarhus, Building 1521,
Ny Munkegade, 8000 Aarhus C, Denmark
3
London Centre for Nanotechnology and Department of Chemistry, University College London, London WC1E 6BT, United Kingdom
4Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany
5
Institute for Storage Ring Facilities, University of Aarhus, Building 1525, Ny Munkegade, 8000 Aarhus C, Denmark
Received 23 April 2009; revised manuscript received 27 July 2009; published 19 August 2009
The oxidized Ag 111 surface has been studied by a combination of experimental and theoretical methods,
scanning tunneling microscopy, x-ray photoelectron spectroscopy, and density functional theory. A large vari-
ety of different surface structures is found, depending on the detailed preparation conditions. The observed
structures fall into four classes: a individually chemisorbed atomic oxygen atoms, b three different oxygen
overlayer structures, including the well-known p 4 4 phase, formed from the same Ag6 and Ag10 building
blocks, c a c 4 8 structure not previously observed, and d at higher oxygen coverages structures char-
acterized by stripes along the high-symmetry directions of the Ag 111 substrate. Our analysis provides a
detailed explanation of the atomic-scale geometry of the Ag6/Ag10 building block structures and the c 4

  

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

 

Collections: Chemistry; Materials Science