Dresden 2006 – wissenschaftliches Programm
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O: Oberflächenphysik
O 38: Adsorption V
O 38.6: Vortrag
Donnerstag, 30. März 2006, 16:15–16:30, TRE Phys
Probing and Modifying Locally the Intrinsic Electronic Structure and the Conformation of Supported Non-Planar Molecules — •Wolf-Dieter Schneider, Marie-Christine Blüm, Marina Pivetta, and François Patthey — Institut de Physique des Nanostructures, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
The supramolecular self-assembly of rubrene (C42H28) on Au(111) results in different adsorption conformations of the physisorbed molecules. Owing to the three-dimensional geometry of the molecule providing an inherent decoupling of the molecular π-states from the substrate, the conformers are distinguished by their submolecular appearance in the scanning tunneling microscopy (STM) images and by the corresponding position of the highest occupied molecular orbital (HOMO) in the differential conductance (dI/dV) spectra. The application of an electric field induces an irreversible switching of the electronic and geometric conformation of the self-assembled molecules.