Detection and switching of the oxidation state of Fe in a self-assembled monolayer

Fan Zheng, V. Pérez-Dieste, J. L. McChesney, Yan Yeung Luk, Nicholas L. Abbott, F. J. Himpsel

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

A self-assembled monolayer of ferrocene-capped alkanethiols is produced in two stable oxidation states of Fe (Fe2+ and Fe3+). These oxidation states are detected with sub-monolayer sensitivity by the fine structure of the Fe2p absorption edge. The native Fe2+ ferrocene layer is converted chemically to Fe3+, and the Fe3+ layer can be transformed back to Fe2+ or possibly Fe0 by irradiation with soft X-rays. The results have implications on switching mechanisms in molecular electronics.

Original languageEnglish (US)
Pages (from-to)L191-L196
JournalSurface Science
Volume587
Issue number3
DOIs
StatePublished - Aug 10 2005

Keywords

  • Alkane thiol
  • Fe
  • Ferrocene
  • Molecular electronics
  • NEXAFS
  • Photochemistry
  • Self-assembled monolayer

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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