Journal
SURFACE SCIENCE
Volume 587, Issue 3, Pages L191-L196Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.susc.2005.05.014
Keywords
NEXAFS; self-assembled monolayer; alkane thiol; ferrocene; Fe; molecular electronics; photochemistry
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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 Fe-0 by irradiation with soft X-rays. The results have implications on switching mechanisms in molecular electronics. (c) 2005 Elsevier B.V. All rights reserved.
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