Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)
O 35.91: Poster
Dienstag, 27. März 2012, 18:15–21:45, Poster B
Preparation and spectroscopic studies of benzo[ghi]perylene dye on SiC — •Nils Fabian Kleimeier1, Deb Kumar Bhowmick1, Nabi Aghdassi1, Steffen Linden1, André Devaux1,2, Luisa De Cola1,2, and Helmut Zacharias1,2 — 1Physikalisches Institut, Westfälische Wilhelms-Universität, Wilhelm-Klemm-Str. 10, 48149 Münster, Germany — 2CeNTech GmbH, Center for Nanotechnology, Heisenbergstr. 11, 48149 Münster, Germany
Organic-inorganic hybrid systems have gained increasing interest due to their versatile applications, e.g., as organic solar cells, biosensors, light emitting devices, or molecular electronics. Our research focuses on polyaromatic hydrocarbons (PAHs) due to their characteristically high fluorescence yield and the possibility to tune their photophysical and electrochemical properties. SiC substrates are functionalized with aminopropyl triethoxysilane (APTES) molecules by a siloxane bond. The benzo[ghi]perylene-1,2-dicarboxylic anhydride is then bound covalently to the APTES via imide bonds. Covalent attachment of the dye to the surface is verified by X-ray photoemission spectroscopy and FT-IR spectroscopy. UV absorption and time-resolved fluorescence and two-photon photoemission spectroscopy (TR-2PPE) measurements have been performed, yielding lifetimes between τ1=1.4 to 1.8 ns and τ2=4.3 to 4.7 ns for the fluorescence and τ=84 fs for the TR-2PPE measurement.