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Electrical Conductance Of Oligothiophene Molecular Wires.

R. Yamada, Hiroaki Kumazawa, Tomoharu Noutoshi, S. Tanaka, H. Tada
Published 2008 · Materials Science, Medicine

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A break junction method using a scanning tunneling microscope has been applied to electrical conductance measurement of newly designed oligothiophene molecules terminated with a thiocyanate group. The tunneling conduction was evident from an exponential decay of the conductance as a function of the molecular length up to ca. 6 nm. The tunneling decay constant was estimated to be 0.1 A (-1). The pre-exponential factor was 1.3 x 10 (-6) S, which was smaller than that observed for alkanedithiols.
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