Berlin 2008 – scientific programme

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SYSA: Symposium Tayloring Organic Interfaces: Molecular Structures and Applications

SYSA 5: Poster Session SYSA

SYSA 5.49: Poster

Tuesday, February 26, 2008, 14:30–20:00, Poster A

Hole bandstructure and mobilities in guanine stacks — •Lars Matthes, Frank Ortmann, Karsten Hannewald, and Friedhelm Bechstedt — Institut für Festkörpertheorie und -optik, Friedrich-Schiller-Universität, Jena, Germany

DNA molecules are no longer regarded as passive molecules with the sole purpose to store genetic information. Nowadays nanowires derived from the DNA are also considered as possible candidates for molecular devices towards a further miniaturization of electronic technology. Therefore an investigation of intrinsic charge carrier mobilitites in such wires is needed. Moreover, the understanding of charge-transport processes in DNA is also highly relevant for biological phenomena such as radiation damage and repair.

Our model system is a stack of guanine molecules where we study the hole mobilities by means of a recently developed theory [1]. Thereby the interaction with phonons and hopping processes play a major role.

[1] Hannewald et al. PRB 69 , 075212 (2004)