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TU Dresden » Faculty of Mechanical Science and Engineering » Institute for Materials Science » Chair of Materials Science and Nanotechnology



Tuesday, 10 May 2011
(at 17:00 in room Seminar Room E05, BIOTEC, Tatzberg 47/49)
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Interaction of electrons with DNA - from damage to spintronics

Ron Naaman

Department of Chemical Physics
Weizmann Institute, Rehovot
  Israel  






We investigated the interaction of electrons possessing well-defined energy, with monolayers of single- and double-stranded DNA oligomers adsorbed on a gold surface. By methodically varying the bases in the oligomers, the effect of the base sequence on the interaction with electrons could be determined as well as the difference between single and double strands. Furthermore, the binding energy of the captured electrons and their location could also be determined. We observed cooperative effects of the bases on electron capturing. Namely the capturing probability of electrons is not simply the sum of the capturing probabilities of each base. Spin selective electron capturing has been found that suggest new role of electrons\u2019 spin in the interaction of electrons with biomolecules and open the possibility to utilize DNA as an efficient spin filter.

Brief Bio:

Ron Naaman completed his B.Sc. in Chemistry at the Ben Gurion University, Beer-Sheva, Israel, and his Ph.D. at the Weizmann Institute in Israel. He then moved for postdoctoral fellowship to Stanford, California, for 2 years and then spent 1 year at the Chemistry Department at Harvard. In 1980, he returned to Israel and became a faculty member at the Weizmann Institute. His work is focused on new electronic properties that emerge from the formation of supramolecular structures. He studies the effect of formation of clusters and van der Waals complexes on the reactivity of molecules. This work was followed by studies of reactive properties and electronic properties of self-assembled monolayers. In parallel, his research group explores the transfer of information through supramolecular systems and produces self-assembled electrical devices.

Invited by BIOTEC

Within the Erasmus Mundus Lectures on Nanoscience and Nanotechnology

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