title: Arylthio-substituted coronenes as tailored building blocks for molecular electronics.
abstract: The electron transport through molecules in molecular devices is typically influenced by the nature of the interfaces with the contacting electrodes and by the interactions between neighbouring molecules. It is a major goal of molecular electronics to adjust the electronic function of a molecular device by tailoring the intrinsic molecular properties and the interfacial and intermolecular interactions. Here, we report on the tunability of the electronic properties of coronene derivatives, namely dodecakis(arylthio)coronenes (DATCs), which are found to exhibit a three-dimensional aromatic system. Scanning tunnelling microscopy (STM), spectroscopy (STS) and simulations based on the density functional theory (DFT) are employed to characterize the structural and electronic properties of these molecules deposited on Au(111) surfaces. It is shown that modifications of the peripheral aryl-groups allow us to specifically affect the self-assembly and the charge transport characteristics of the molecules. Molecular assemblies like supramolecular wires with highly delocalized orbitals and single molecules with molecular "quantum dot" characteristics are obtained in this way.
authors.affiliation: Peter Grünberg Institut (PGI-7) and JARA-FIT, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Kowalzik
authors.forename: Nicolae
authors.initials: N
authors.lastname: Atodiresei
authors.forename: Marc
authors.initials: M
authors.lastname: Gingras
authors.forename: Vasile
authors.initials: V
authors.lastname: Caciuc
authors.forename: Nicolas
authors.initials: N
authors.lastname: Schnaebele
authors.forename: Jean-Manuel
authors.initials: JM
authors.lastname: Raimundo
authors.forename: Stefan
authors.initials: S
authors.lastname: Blügel
authors.forename: Rainer
authors.initials: R
authors.lastname: Waser
authors.forename: Silvia
authors.initials: S
authors.lastname: Karthäuser