Structure-dependent change of desorption species from n-alkanethiol monolayers adsorbed on Au(111): Desorption of thiolate radicals from low-density structures

H. Kondoh, C. Kodama, H. Nozoye

研究成果: Article

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The coverage dependence of desorption behavior of n-alkanethiol monolayers on Au(111) has been studied using thermal desorption spectroscopy (TDS) together with scanning tunneling microscopy (STM) to investigate the molecule - substrate interactions. STM observations indicated four different phases during the growth. We present for the first time evidence for a drastic coverage-dependent change of desorption species, which is parallel with a structure change from a low-density phase to a denser phase: while the thiolates in the latter phase bimolecularly desorb as disulfides, those in the former phase unimolecularly desorb as thiolate radicals.

元の言語English
ページ(範囲)2310-2312
ページ数3
ジャーナルJournal of Physical Chemistry B
102
発行部数13
DOI
出版物ステータスPublished - 1998 3 26
外部発表Yes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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