Multiple bonding structures of C2H2 chemisorbed on Si(1 0 0)

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DOIResolve DOI: http://doi.org/10.1016/S0009-2614(01)00535-8
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TypeArticle
Journal titleChemical Physics Letters
Volume344
Issue1-2
Pages712; # of pages: 6
AbstractAdsorption of acetylene on the Si(1 0 0)-(2x1) surface was studied at room temperature by scanning tunneling microscopy (STM) and theoretical modeling. Acetylene molecules adsorb nondissociatively in three distinctive bonding configurations, not one, as reported previously. In Configuration I, C2H2 molecules adsorb in di-? form over a single silicon dimer with a relative population of 0.33 at low coverage. Configuration II has an initial formation probability of 0.51 and involves adsorption across the ends of two adjacent dimers in the same row. In Configuration III (r-bridge) C2H2 forms four bonds as it symmetrically bridges two neighboring dimers. Relative populations depend strongly on coverage. Above a coverage of not, vert, similar0.13 an acceleration in the rate of formation of Configuration III (r-bridge) is observed.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada; National Institute for Nanotechnology; NRC Steacie Institute for Molecular Sciences
Peer reviewedNo
NPARC number12327717
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Record identifier0cca1558-481d-4920-89cb-9800466b7b17
Record created2009-09-10
Record modified2016-05-09
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