Berlin 2005 – wissenschaftliches Programm

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TT: Tiefe Temperaturen

TT 8: Posters Transport

TT 8.29: Poster

Freitag, 4. März 2005, 14:00–18:00, Poster TU C

Electronic and Optoelectronic Properties of Single-Molecule Junctions — •Joachim Reichert¹, Cao Qi¹, Harald Fuchs¹, Ivan Stich², and Dominik Marx³ — ¹Physikalisches Institut, Westfälische Wilhelms-Universität Münster, D - 48149 Münster — ²Center for Computational Material Science, Slovak University of Technology, Ilkovicova 3, 812 19 Bratislava — ³Lehrstuhl für Theoretische Chemie, Ruhr-Universität Bochum, D - 44780 Bochum

Recent developments and advances in atomic-scale imaging and manipulation techniques enables access to a new field of single molecule experiments. Electronic transport measurements through single organic molecules which are immobilized by self assembling techniques between two metallic electrodes (e.g. mechanically controlled breakjunction [1]) as well as tunnelling experiments through molecular films with STM have proven the ability of organic molecules to act as functional parts in nanoscale-devices. Especially scanning near-field optical microscopy (SNOM) with its ability to apply an optical field to a molecular system in a controlled manner enlarges the range of experimental available properties in metal-anchored molecular junctions. With a combination of these techniques we want to study the electronic/optoelectronic properties of single molecules covalently linked between a metallic substrate and a SNOM-tip to improve the understanding of electronic transport through single molecules.

[1] J. Reichert, R. Ochs, D. Beckmann, H.B. Weber, M. Mayor, H. v. Löhneysen, Phys.Rev.Lett. 88, 176804 (2002). [2] H.-U. Danzebrink, U. C. Fischer, NATO ASI Series 242, 255, 303 (1993).