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@ARTICLE{Busiakiewicz:11169,
author = {Busiakiewicz, A. and Karthäuser, S. and Homberger, M. and
Kowalzik, P. and Waser, R. and Simon, U.},
title = {{E}lectronic transport properties of individual
4,4'-bis(mercaptoalkyl)-biphenyl derivatives measured in
{STM}-based break junctions},
journal = {Physical Chemistry Chemical Physics},
volume = {12},
issn = {1463-9076},
address = {Cambridge},
publisher = {RSC Publ.},
reportid = {PreJuSER-11169},
pages = {10518 - 10524},
year = {2010},
note = {The authors thank Birgit Hahn and Brigitte Hermanns (both
IAC) for the support in the preparation of the acetyl
protected MABPs. Financial support by the German Research
Foundation (DFG) and the Institute Functional Molecular
Systems for Information Technology (IFMIT) is gratefully
acknowledged.},
abstract = {Electronic transport measurements of single, systematically
varied 4,4'-bis(mercaptoalkyl)-biphenyl derivatives (MABP)
are performed in a controlled test-device. The molecules are
composed of a central biphenyl unit (BP) carrying two
mercaptoalkyl substituents with different chain lengths (m,
n = number of CH(2)-units), in the para-position of the BP
unit. The total length of both spacers is m + n = 10. The
molecular conductance of these individual MABPs deposited on
Au (111) substrates is studied using STM-based break
junctions. It is shown that the molecular conductance
depends on the relative position of the BP unit within the
molecule. In the case of the symmetric derivative 5BP5 a
value of 0.07 +/- 0.01 nS is obtained, while for 1BP9 the
molecular conductance is doubled and a value of 0.17 +/-
0.03 nS results. This relatively high value of conductance
for the single Au(tip)-1BP9-Au(substrate) junction is
attributed to an increased coupling of the BP unit to the
adjacent electrode, i.e. the STM-tip or the Au-substrate. We
address the role of the specific contact situation (-S-Au)
and of the position of the electrically active molecular
moiety and thus come to a deeper understanding of the
electronic transport properties of
4,4'-bis(mercaptoalkyl)biphenyl derivatives.},
keywords = {J (WoSType)},
cin = {IFF-6 / JARA-FIT},
ddc = {540},
cid = {I:(DE-Juel1)VDB786 / $I:(DE-82)080009_20140620$},
pnm = {Grundlagen für zukünftige Informationstechnologien},
pid = {G:(DE-Juel1)FUEK412},
shelfmark = {Chemistry, Physical / Physics, Atomic, Molecular $\&$
Chemical},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:20607163},
UT = {WOS:000281352300047},
doi = {10.1039/c004245e},
url = {https://juser.fz-juelich.de/record/11169},
}