Adsorption of sulfur on Ag(100)

TitleAdsorption of sulfur on Ag(100)
Publication TypeJournal Article
Year of Publication2011
AuthorsRussell SM, Shen MM, Liu DJ, Thiel PA
Journal TitleSurface Science
Volume605
Pages520-527
Date Published03
Type of ArticleArticle
ISBN Number0039-6028
Accession NumberISI:000287833500010
Keywords100, CALCULATIONS, chemisorption, Density functional, diffusion, faces 111, initio molecular-dynamics, metal-surfaces, oxygen, phase-diagram, reconstruction, scanning-tunneling-microscopy, silver, sulphides, Surface relaxation and reconstruction
Abstract

We have used scanning tunneling microscopy and density Functional theory to investigate the structures formed by sulfur on Ag(100). As indicated by previous low-energy electron diffraction studies, the main phases have unit cells of p(2 x 2) and (root 17 x root 17)R14 degrees. We show that the latter is a reconstruction. The favored structural model is one in which 5 Ag atoms are missing from the (100) surface plane per unit cell. The ejected Ag atoms combine with sulfur to form islands of the reconstructed phase on the terraces. The (root 17 x root 17)R14 degrees phase coexists with the p(2 x 2), at sulfur coverages slightly above 0.25 monolayers. In addition, chain-like structures are observed in SIM, both at room temperature (where they are dynamic) and below (where they are not). These results are compared with relevant literature for copper surfaces. (C) 2010 Elsevier B.V. All rights reserved.

URL<Go to ISI>://000287833500010
DOI10.1016/j.susc.2010.12.010
Alternate JournalSurf. Sci.