Regensburg 2016 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 49: Metal Substrates: Structure, Adsorption and Growth
O 49.5: Poster
Dienstag, 8. März 2016, 18:15–20:30, Poster E
Thin epitaxial films of tetraphenyldibenzoperiflanthene (DBP) on Ag(111) — •Tino Kirchhuebel1, Marco Gruenewald1, Falko Sojka1, Satoshi Kera2,3,4, Fabio Bussolotti2, Takahiro Ueba2,3, Nobuo Ueno4, Gaël Rouillé5, Roman Forker1, and Torsten Fritz1 — 1Institute of Solid State Physics, Friedrich Schiller University Jena, Germany — 2Institute of Molecular Science, Myodaiji, Okazaki, Japan — 3SOKENDAI, The Graduate University of Advanced Studies, Okazaki, Japan — 4Graduate School of Advanced Integration Science, Chiba University, Japan — 5Institute of Solid State Physics & Laboratory Astrophysics Group of the Max Planck Institute for Astronomy, Friedrich Schiller University Jena, Germany
We investigated epitaxial tetraphenyldibenzoperiflanthene (DBP) thin films grown on Ag(111). Structural characterization using LEED and STM revealed a well-ordered flat-lying thin film grown in a herringbone arrangement within the first monolayer. In order to trace the development of the optical properties in situ differential reflectance spectroscopy (DRS) was performed. A strong interaction between molecules in contact with the Ag(111) surface was found. Depending on the coverage two distinct spectral fingerprints of DBP molecules on top of the first monolayer arise, indicating a transformation from DBP monomers to aggregates. Ultraviolet photoelectron spectroscopy (UPS) measurements reveal two distinct sets of peaks for the occupied states of DBP multilayer samples on Ag(111), being indicative of an individual alignment of electronic states for each DBP species.