Electronic Transport in Single Molecule Junctions: Control of the Molecule-Electrode Coupling Through Intramolecular Tunneling Barriers

TY - JOUR

T1 - Electronic Transport in Single Molecule Junctions: Control of the Molecule-Electrode Coupling Through Intramolecular Tunneling Barriers

AU - Danilov, Andrey

AU - Kubatkin, Sergey

AU - Kafanov, Sergey

AU - Hedegård, Per

AU - Stuhr-Hansen, Nicolai

AU - Moth-Poulsen, Kasper

AU - Bjørnholm, Thomas

N1 - Paper id:: DOI: 10.1021/nl071228o

PY - 2008

Y1 - 2008

N2 - We report on single molecule electron transport measurements of two oligophenylenevinylene (OPV3) derivatives placed in a nanogap between gold (Au) or lead (Pb) electrodes in a field effect transistor device. Both derivatives contain thiol end groups that allow chemical binding to the electrodes. One derivative has additional methylene groups separating the thiols from the delocalized -electron system. The insertion of methylene groups changes the open state conductance by 3-4 orders of magnitude and changes the transport mechanism from a coherent regime with finite zero-bias conductance to sequential tunneling and Coulomb blockade behavior.

AB - We report on single molecule electron transport measurements of two oligophenylenevinylene (OPV3) derivatives placed in a nanogap between gold (Au) or lead (Pb) electrodes in a field effect transistor device. Both derivatives contain thiol end groups that allow chemical binding to the electrodes. One derivative has additional methylene groups separating the thiols from the delocalized -electron system. The insertion of methylene groups changes the open state conductance by 3-4 orders of magnitude and changes the transport mechanism from a coherent regime with finite zero-bias conductance to sequential tunneling and Coulomb blockade behavior.

M3 - Journal article

SN - 1530-6984

VL - 8

SP - 1

EP - 5

JO - Nano Letters

JF - Nano Letters

ER -