Düsseldorf 2007 – wissenschaftliches Programm

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SYFM: Symposium Quantenkontrolle funktionaler Moleküle

SYFM 2: Quantum control of functional molecules II

SYFM 2.2: Hauptvortrag

Mittwoch, 21. März 2007, 17:00–17:30, 6C

Mechanisms of electron induced switching at interfaces — •Martin Wolf — Fachbereich Physik, Freie Universität Berlin, 14195 Berlin

The possibility to design molecules with dedicated functional properties opens the perspective to use molecules as building blocks for integrated functional devices. However, for applications like in molecular electronics it will be essential to control the switching between different molecular states and to connect the molecular system with the outside world by contacts with electrodes. This requires the synthesis and design of appropriate nanosystems and a basic understanding of structural and electronic properties including the interaction with solid interfaces. In addition, one would like to achieve active control of the switching between different molecular conformations by external stimuli like electromagnetic fields, forces and currents. In this talk I will present the approach of the collaborative research center Sfb 658 "Elementary processes in molecular switches at surfaces" to this problem and discuss our current understanding using several examples for (reversible) conformational switching processes at surfaces induced by charge transfer, electrical fields, currents and light probed with scanning tunnelling microscopy and photoemission spectroscopy.