Journal Article

PreJuSER-56505

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Electrical Characterization of Biphenylalkanethiol SAMs

Lüssem, B.FZJ* ; Müller-Meskamp, L.FZJ* ; Karthäuser, S.FZJ* ; Homberger, M. ; Simon, U. ; Waser, R.FZJ*

2007
Soc. Washington, DC

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Please use a persistent id in citations: doi:10.1021/jp067459l

Abstract: The electron-transfer properties of a full-coverage self-assembled monolayer of biphenylethanethiol (CH3-C6H4-C6H4-(CH2)(2)-SH, BP2) is studied by current versus distance spectroscopy. With this, the electrical properties of different functional groups in one molecule are vertically resolved. The current versus distance plot is shown to consist of three different parts, whose logarithmic slope is interpreted as the decay length of the vacuum, the biphenyl group, and the alkane chain. This finding is described in a trilayer tunnel junction model and the decay constant, beta(Ph), of the tunneling current through the biphenyl group is estimated. Besides characterizing the biphenylalkanethiol monolayers electrically, the structure of these layers is determined by UHV-STM. Two new structures with rectangular (4 x 6 root 3) lattices are identified for 4'-methyl-1,1'-biphenyl-4-ethanethiol self-assembled monolayers on (111)-oriented gold surfaces.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Elektronische Materialien (IFF-6)
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 2007

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