Electrical conductance of oligothiophene molecular wires.
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.
Yamada
Ryo
R
Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.
Kumazawa
Hiroaki
H
Noutoshi
Tomoharu
T
Tanaka
Shoji
S
Tada
Hirokazu
H