Journal
SURFACE SCIENCE
Volume 602, Issue 3, Pages 661-670Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.susc.2007.10.046
Keywords
scanning tunneling microscopy; compound formation; sintering; cobalt; sulphide; silver; low index single crystal surfaces; nanostructure
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Three different cobalt sulfur structures of different dimensionality and order develop upon interaction of sulfur with nanometer-sized cobalt clusters grown on Ag(111). We investigate the formation and transformation of these structures by fast-scanning tunneling microscopy. Initially, a meta-stable quasi one-dimensional structure consisting of double rows forms, and a disordered two-dimensional structure results from a collapse of the rows. However, the final thermodynamically stable structure is again crystalline and three-dimensional, and the nucleation and growth of this structure indicate that the kinetics is interface-limited. (C) 2007 Elsevier B.V. All rights reserved.
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