title: Electronic transport in single molecule junctions: control of the molecule-electrode coupling through intramolecular tunneling barriers.
abstract: 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 pi-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.
authors: Nano-Science Center (Niels Bohr Institute and Department of Chemistry), University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark.
authors: Andrey
authors: A
authors: Danilov
authors: Sergey
authors: S
authors: Kubatkin
authors: Sergey
authors: S
authors: Kafanov
authors: Per
authors: P
authors: Hedegård
authors: Nicolai
authors: N
authors: Stuhr-Hansen
authors: Kasper
authors: K
authors: Moth-Poulsen
authors: Thomas
authors: T
authors: Bjørnholm