title: Organic molecular beam deposition of oligophenyls on Au111: A study by X-ray absorption spectroscopy.
abstract: Near-edge X-ray absorption fine structure (NEXAFS) spectroscopy has been applied to reveal the molecular arrangement of ultrathin oligophenyl films [p-quaterphenyl (4P) and p-hexaphenyl (6P)] on Au(111). In the half-monolayer films the molecules lie flat on the surface but still have a considerable inter-ring twist of 30 degrees -40 degrees , similar to the gas-phase conformation. In the saturated monolayer film the second half of the molecules is side-tilted by an angle of less than 66 degrees with respect to the surface. This arrangement is already similar to that in bulk net planes of thicker films parallel to the surface, that is, the 4P(211) and 6P(21-3) planes, respectively.
authors.affiliation: Institute of Solid State Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria.
authors.forename: Stefan
authors.initials: S
authors.lastname: Müllegger
authors.forename: Kathrin
authors.initials: K
authors.lastname: Hänel
authors.forename: Thomas
authors.initials: T
authors.lastname: Strunskus
authors.forename: Christof
authors.initials: C
authors.lastname: Wöll
authors.forename: Adolf
authors.initials: A
authors.lastname: Winkler
mesh_terms: D001555:Benzene Derivatives / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D010316:Particle Size; D012680:Sensitivity and Specificity; D013057:Spectrum Analysis / Q000379:methods; D013499:Surface Properties; D014965:X-Rays
chemical_list: D001555:Benzene Derivatives; D006046:Gold