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CPP: Chemische Physik und Polymerphysik

CPP 12: Selforganized and supramolecular assemblies I

CPP 12.2: Vortrag

Montag, 7. März 2005, 10:00–10:15, TU C243

Scanning tunneling microscopy and spectroscopy of molecular stacks — •Frank Jäckel¹, Paolo Samori^1,2,3, Nikolai Severin¹, Mark D. Watson^4,5, Klaus Müllen⁴, and Jürgen P. Rabe¹ — ¹Humboldt-Universität zu Berlin, Institut für Physik, Newtonstr. 15, 12489 Berlin, Germany — ²ISOF-CNR, Via Gobetti 101, 40129 Bologna, Italy — ³IS-ULP, 8 Allee Gaspard Monge, 67083 Strasbourg, France — ⁴Max-Planck-Institut für Polymerforschung, Ackermannweg 10, 55128 Mainz, Germany — ⁵University of Kentucky, Department of Chemistry, Lexington KY 40506-0055, USA

We present a scanning tunneling microscopy and spectroscopy study at the solid-liquid interface of hexa-peri-hexabenzocoronenes (HBC) in different three-dimensional stacked geometries, namely covalently bound as HBC-cyclophanes and physisorbed in double layers consisting either of HBC only or of a mixture of HBC and an electron acceptor. Tunneling bias dependent imaging and tunneling spectroscopy are applied to demonstrate the sensitivity of the electronic coupling between the HBCs to the relative orientation of the molecules with respect to each other.