Dresden 2011 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 67: Graphene IV
O 67.6: Vortrag
Donnerstag, 17. März 2011, 12:30–12:45, WIL B321
Structural and Electronic Properties of Graphene - Nanographene Systems — •Stefan Eilers1, Stefan Machulik1, W Ted Masselink1, Klaus Müllen2, and Jürgen P Rabe1 — 1Institute of Physics, Humboldt-Universität zu Berlin, Germany — 2Max Planck Institute for Polymer Research, Mainz, Germany
Graphene, because of its unique combination of electronic, optical and mechanical properties, is an attractive electrode for functional molecules. On the other hand, nanographenes can be synthesised with various functionalities, which could find use in applications for future molecular and organic electronics. But can a functional system of graphene and nanographenes be realised? We show that nanographenes can self-assemble on exfoliated monolayer and bilayer graphene to form functional highly ordered molecular layers with defined orientations and electronic properties, largely independent of surface roughness and local environment. We present scanning tunnelling microscopy data at the solid-liquid interface for graphene and nanographene as well as tunnelling spectroscopy data. Graphene as electrode and substrate for aligned layers of functional molecules on insulating wafers offers a wide range of potential applications and the aggregation of functional molecules from solution supplies a basis for future cost-effective production of devices.