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Interaction of vapor-deposited Ti and Au with molecular wires

Appl. Phys. Lett. 84, 4008 (2004); doi:10.1063/1.1748844

Published 5 May 2004

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A. V. Walker, T. B. Tighe, J. Stapleton, B. C. Haynie, S. Upilli, D. L. Allara, and N. Winograd
Department of Chemistry, Pennsylvania State University, 181 Materials Research Institute, University Park, Pennsylvania 16802
We have investigated the interaction of vapor-deposited titanium and gold with a self-assembled monolayer (SAM) of 4-[4[prime]-(phenylethynyl)-phenylethynyl]-benzenthiol, an unsubstituted oligo(phenylene-ethynylene), chemisorbed on a gold substrate, a typical SAM of interest for molecular electronics. Deposited titanium atoms are observed to react in a top-down fashion with the SAM molecules to form Ti–C bonds, destroying the monolayer structure. In contrast, deposited Au atoms undergo continuous penetration through the monolayer, even at high coverages, leaving the SAM "floating" on the Au substrate surface. ©2004 American Institute of Physics.
History: Received 15 December 2003; accepted 22 March 2004; published 5 May 2004
Permalink: http://link.aip.org/link/?APPLAB/84/4008/1
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KEYWORDS and PACS

Keywords
PACS
  • 68.43.Mn
    Adsorption/desorption kinetics
  • 82.80.Ms
    Mass spectrometry (chemical analysis) including SIMS, multiphoton ionization and resonance ionization mass spectrometry, MALDI
  • 82.65.+r
    Surface and interface chemistry; heterogeneous catalysis at surfaces
  • YEAR: 2004

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ISSN:
0003-6951 (print)   1077-3118 (online)
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