title: Growth of an oligopyridine adlayer on Ag(100)--a scanning tunnelling microscopy study.
abstract: The growth behaviour of the oligopyridine derivative 2-phenyl-4,6-bis(6-(pyridine-2-yl)-4-(pyridine-4-yl)pyridine-2-yl)pyrimidine (2,4'-BTP) on Ag(100) in the sub-monolayer regime was investigated by variable temperature scanning tunneling microscopy under ultra-high vacuum conditions. Over the entire coverage range, the molecules are adsorbed in a flat lying configuration, with preferential orientations with respect to the <110> direction of the surface. The azimuth angles are derived using a previously introduced algorithm that fits the positions of the intramolecular N atoms geometrically to the underlying surface lattice ("points-to-lattice fit") [H.E. Hoster et al., Langmuir 2007, 23, 11570], indicating that the orientation of the admolecules and thus of the adllayer structure with respect to the Ag(100) surface lattice is determined by the 2,4'-BTP-Ag(100) interaction, while intermolecular interactions are decisive for the structure of the adlayer. The results will be compared to other adsorption systems.
authors.affiliation: Institute of Surface Chemistry and Catalysis, Ulm University, D-89069 Ulm, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Waldmann
authors.forename: Christina
authors.initials: C
authors.lastname: Nenon
authors.forename: Harry E
authors.initials: HE
authors.lastname: Hoster
authors.forename: R Jürgen
authors.initials: RJ
authors.lastname: Behm