title: Electrical transport properties of oligothiophene-based molecular films studied by current sensing atomic force microscopy.
abstract: Using conducting probe atomic force microscopy (CAFM) we have investigated the electrical conduction properties of monolayer films of a pentathiophene derivative on a SiO(2)/Si-p+ substrate. By a combination of current-voltage spectroscopy and current imaging we show that lateral charge transport takes place in the plane of the monolayer via hole injection into the highest occupied molecular orbitals of the pentathiophene unit. Our CAFM data suggest that the conductivity is anisotropic relative to the crystalline directions of the molecular lattice.
authors.affiliation: Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
authors.forename: Bas L M
authors.initials: BL
authors.lastname: Hendriksen
authors.forename: Florent
authors.initials: F
authors.lastname: Martin
authors.forename: Yabing
authors.initials: Y
authors.lastname: Qi
authors.forename: Clayton
authors.initials: C
authors.lastname: Mauldin
authors.forename: Nenad
authors.initials: N
authors.lastname: Vukmirovic
authors.forename: Junfeng
authors.initials: J
authors.lastname: Ren
authors.forename: Herbert
authors.initials: H
authors.lastname: Wormeester
authors.forename: Allard J
authors.initials: AJ
authors.lastname: Katan
authors.forename: Virginia
authors.initials: V
authors.lastname: Altoe
authors.forename: Shaul
authors.initials: S
authors.lastname: Aloni
authors.forename: Jean M J
authors.initials: JM
authors.lastname: Fréchet
authors.forename: Lin-Wang
authors.initials: LW
authors.lastname: Wang
authors.forename: Miquel
authors.initials: M
authors.lastname: Salmeron