Combined structure analysis of STM and surface XAFS for self-assembly of metal-thiolate complex at equilibrium: Hexanethiolate on Cu(1 1 1)

Mathias Laurin, Xiang Shao, Yuuichi Fujimori, A. Nojima, E. O. Sako, J. Miyawaki, M. Shimojo, Yasuhiro Iwasawa, Toshiaki Ohta, Hiroshi Kondoh

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4 Citations (Scopus)

Abstract

The structure of 1-hexanethiolate (C6H13S) self-assembled monolayers adsorbed onto a Cu(1 1 1) surface was studied with a combination of scanning tunneling microscopy (STM), and carbon and sulfur K-edge X-ray absorption fine structure (XAFS) experiments. S K-XAFS confirmed that sulfur adsorbs onto deep three-fold hollow sites. Moreover, these sites appear to shrink with a small anisotropy between adsorption and equilibrium. STM further revealed three different ordered superstructures. Finally, a single long-range ordered phase exhibiting a striped moiré pattern is imaged at thermodynamic equilibrium.

Original languageEnglish
Pages (from-to)88-94
Number of pages7
JournalJournal of Electron Spectroscopy and Related Phenomena
Volume172
Issue number1-3
DOIs
Publication statusPublished - 2009 May 1

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Keywords

  • Cu(1 1 1)
  • Extended X-ray absorption fine structure
  • Hexanethiolate
  • Scanning tunneling microscopy
  • Self-assembled monolayer

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Radiation
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Spectroscopy
  • Physical and Theoretical Chemistry

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