Reversible exchange of self assembled monolayers of semi fluorinated n-alkanethiols and n-alkanethiols on Au/mica surfaces

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Abstract

Scanning tunnelling microscopy (STM) and photoelastic modulation infrared reflection absorption spectroscopy (PM-IRRAS) have been used to investigate the exchange of self-assembled monolayers (SAMs) of n-octanethiolate by semifluorinated n-octanethiolate from ethanolic solution at 340 K. The process occurs via displacement of the thiols from domain boundaries. By contrast, the reverse exchange process occurs more homogeneously via the formation of mixed thiolate domains. The ability of semifluorinated octanethiolate to adopt a range of adsorption sites with approximately similar adsorption energies may lead to this contrasting behavior.
Original languageEnglish
Pages (from-to)13997-14000
JournalJournal of Physical Chemistry C
Volume112
Issue number36
Early online date14 Aug 2008
DOIs
Publication statusPublished - 11 Sept 2008

Keywords

  • ORGANIC THIOLS
  • GOLD
  • AU(111)
  • DISPLACEMENT
  • COADSORPTION
  • REPLACEMENT
  • ELECTRONICS
  • INTERFACE
  • KINETICS
  • SUPPORTS

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