Benzene on Au{111} at 4 K: Monolayer growth and tip-induced molecular cascades

Patrick Han, Brent A. Mantooth, E. Charles H. Sykes, Zachary J. Donhauser, Paul S. Weiss

    Research output: Contribution to journalArticlepeer-review

    63 Citations (Scopus)

    Abstract

    Low-temperature scanning tunneling microscopy has been used to characterize the various structures of submonolayer and near-monolayer coverages of benzene (C6H6) on Au{111} at 4 K. At low coverage, benzene is found to adsorb preferentially at the top of the Au monatomic steps and is weakly adsorbed on the terraces. At near-monolayer coverage, benzene was found to form several long-range commensurate overlayer structures that depend on the regions of the reconstructed Au{111} surface, namely a (√52 × √52)R13.9° structure over the hcp regions and a (√133 × √133)R17.5° "pinwheel" structure over the fcc regions. Time-lapse imaging revealed concerted cascade motion of the benzene molecules in the (√133 × √133)R17.5° pinwheel overlayer. We demonstrate that the observed cascade motion is a result of concerted molecular motion and not independent random motion.

    Original languageEnglish
    Pages (from-to)10787-10793
    Number of pages7
    JournalJournal of the American Chemical Society
    Volume126
    Issue number34
    DOIs
    Publication statusPublished - 2004 Sep 1

    ASJC Scopus subject areas

    • Catalysis
    • Chemistry(all)
    • Biochemistry
    • Colloid and Surface Chemistry

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