Intermolecular Effects on Tunneling through Acenes in Large-Area and Single-Molecule Junctions.

ABSTRACT: This paper describes the conductance of single-molecules and self-assembled monolayers comprising an oligophenyleneethynylene core, functionalized with acenes of increasing length that extend conjugation perpendicular to the path of tunneling electrons. In the Mechanically Controlled Break Junction (MCBJ) experiment, multiple conductance plateaus were identified. The high conductance plateau, which we attribute to the single molecule conformation, shows an increase of conductance as a function of acene length, in good agreement with theoretical predictions. The lower plateau is attributed to multiple molecules bridging the junctions with intermolecular interactions playing a role. In junctions comprising a self-assembled monolayer with eutectic Ga-In top-contacts (EGaIn), the pentacene der

SUBMITTER: Liu Y 

PROVIDER: S-EPMC7569675 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature