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The 18th CIMoS Seminar

Lecture Title "Chiral Molecules and the Electron's Spin- From Spintronics to Enantio-Separation"
Date Friday 3 August 2018 16:00 to 17:30
Lecturer Prof. Ron Naaman (Department of Chemical and Biological Physics, Weizmann Institute of Science, Israel)
Place

Institute for Molecular Science, Research Building, Seminar Room #201
Summary

18_cimos.jpgSpin based properties, applications, and devices are commonly related to magnetic effects and to magnetic materials. However, we found that chiral organic molecules act as spin filters for photoelectrons transmission, 1 in electron transfer, 2 and in electron transport. 3

The new effect, termed Chiral Induced Spin Selectivity (CISS), 4,5 was found, among others, in bio-molecules and in bio-systems. It has interesting implications for the production of new types of spintronics devices 6,7 and on electron transfer in biological systems. 8 Recently we found that charge polarization in chiral molecules is accompanied by spin polarization. 9 This finding shed new light on enantio-specific interactions and it opens the possibility to construct novel methods for enantio-separation.

References

1. Gohler, B.; Hamelbeck, V.; Markus, T.Z.; Kettner, M.; Hanne, G.F.; Vager, Z.; Naaman, R.; Zacharias, H. Science 2011, 331, 894.

2. Mishra, D.; Markus, T.Z.; Naaman, R.; Kettner, M.; Gohler, B.; Zacharias, H.; Friedman, N.; Sheves, M.; Fontanesi, C. PNAS, 2013, 110, 14872.

3. Xie, Z.; Markus, T. Z.; Cohen, S. R.; Vager, Z.; Gutierrez, R.; Naaman, R. Nano Letters, 2011, 11, 4652.

4. Naaman, R.; Waldeck, D.H. J. Phys. Chem. Lett. (feature) 2012, 3, 2178.

5. R. Naaman, D. H. Waldeck, Spintronics and Chirality: Spin Selectivity in Electron Transport Through Chiral Molecules, Ann. Rev. Phys. Chem. 2015, 66, 263-81.6.

6. O. Ben Dor, S. Yochelis, A. Radko, K. Vankayala, E. Capua, A. Capua, S.-H. Yang, L. T. Baczewski, S. S. P. Parkin, R. Naaman, and Y. Paltiel, Nat. Comm. 2017, 8:14567.

7. K. Michaeli, V. Varade, R. Naaman, D. Waldeck, Journal of Physics: Condensed Matter, 2017, 29, 103002.

8. I. Carmeli, K. S. Kumar, O. Hieflero, C. Carmeli, R. Naaman, Angew. Chemie 2014, 53, 8953.

9. A. Kumar, E. Capua, M. K. Kesharwani, J. M. L. Martin, E. Sitbon, D. H. Waldeck, R.Naaman, PNAS, 2017, 114, 2474.
Other

Shuji Akiyama
(Research Center of Integrative Molecular Systems)
Awards & Honors International collaboration

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