Journal Article

PreJuSER-329

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Charge transport in single Au-Alkandithiol-Au junctions - Conductance histograms and conformational degress of freedom

Li, C.FZJ* ; Pobelov, I.FZJ* ; Wandlowski, T.FZJ* ; Bagrets, A. ; Arnold, A. ; Evers, F.

2008
American Chemical Society Washington, DC

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Please use a persistent id in citations: http://hdl.handle.net/2128/25409  doi:10.1021/ja0762386

Abstract: Recent STM molecular break-junction experiments have revealed multiple series of peaks in the conductance histograms of alkanedithiols. To resolve a current controversy, we present here an in-depth study of charge transport properties of Au|alkanedithiol|Au junctions. Conductance histograms extracted from our STM measurements unambiguously confirm features showing more than one set of junction configurations. On the basis of quantum chemistry calculations, we propose that certain combinations of different sulfur-gold couplings and trans/gauche conformations act as the driving agents. The present study may have implications for experimental methodology: whenever conductances of different junction conformations are not statistically independent, the conductance histogram technique can exhibit a single series only, even though a much larger abundance of microscopic realizations exists.

Keyword(s): Electric Conductivity (MeSH) ; Gold: chemistry (MeSH) ; Molecular Conformation (MeSH) ; Quantum Theory (MeSH) ; Sulfhydryl Compounds: chemistry (MeSH) ; Sulfhydryl Compounds ; Gold ; J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Grenz- und Oberflächen (IBN-3)
2. Center of Nanoelectronic Systems for Information Technology (CNI)
3. Jülich-Aachen Research Alliance - Fundamentals of Future Information Technology (JARA-FIT)

Research Program(s):

1. Grundlagen für zukünftige Informationstechnologien (P42)

Appears in the scientific report 2008

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Database coverage:

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