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Electrical Transport Study of Phenylene‐Based π‐Conjugated Molecules in a Three‐Terminal Geometry
Author(s) -
LEE JEONGO,
LIENTSCHNIG GÜNTHER,
WIERTZ FRANK G.H.,
STRUIJK MARTIN,
JANSSEN RÉNE A.J.,
EGBERINK RICHARD,
REINHOUDT DAVID N.,
GRIMSDALE ANDREW C.,
MÜLLEN KLAUS,
HADLEY PETER,
DEKKERA CEES
Publication year - 2003
Publication title -
annals of the new york academy of sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.712
H-Index - 248
eISSN - 1749-6632
pISSN - 0077-8923
DOI - 10.1196/annals.1292.008
Subject(s) - conductance , phenylene , molecule , conjugated system , terminal (telecommunication) , electrode , monolayer , materials science , optoelectronics , molecular electronics , transistor , nanotechnology , chemistry , voltage , polymer , electrical engineering , physics , computer science , composite material , condensed matter physics , organic chemistry , telecommunications , engineering
A bstract : We fabricated three‐terminal devices with conjugated molecules. Two different device layouts were used to measure both very short molecules (with one or two benzene rings) and relatively long ones (as long as 8 nm). To achieve an optimum gate effect, we used aluminum gates covered with a very thin native oxide layer. Molecules with thiol end groups were positioned between the source and drain electrodes by self‐assembly. The device yield was low for short molecules, most likely due to defects in the self‐assembled monolayers. Most of the devices made with short molecules did not show any gate effect at all; a small gate effect was only observed in two samples made with 1,3‐benzenedithiol. Some devices showed clear negative differential conductance peaks. In some devices made with long molecules, we observed a small change of conductance with gate voltage.