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The Study of Charge Transport in Nanoscale DNA Structures

Published online by Cambridge University Press:  01 February 2011

G. Bart ,
M. R. Singh  and
M. Zinke-Allamang
G. Bart
Affiliation:
Department of Physics and Astronomy, University of Western Ontario, London, Canada N6G 3K7
M. R. Singh
Affiliation:
Department of Physics and Astronomy, University of Western Ontario, London, Canada N6G 3K7
M. Zinke-Allamang
Affiliation:
Department of Physics and Astronomy, University of Western Ontario, London, Canada N6G 3K7
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Abstract

We have studied the variable range hopping (VRH) mechanism for polarons in DNA structures using an exponential density of states. Due to the electron-phonon interaction localized polarons are formed in the DNA helix. The unwinding of DNA increases molecular orbital overlap between bases while decreasing the base-to-base distance. These types of vibrations create phonons. We consider that DNA has a band tail which has an exponential density of states and we have calculated the temperature- and the electric field dependence of the conductivity. We compare our model with the experiments of the electrical conductivity of samples of double-stranded H5N1 genes of avian Influenza virus DNA. Our theory is able to explain their data.

Keywords

DNAConductivityHoppingLocalizationNanotechnology
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1280: Nanomaterials for Biomedical Applications , 2010 , sim21-abs031
Copyright
Copyright © Materials Research Society 2010

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References

1. Ventra, M. Di and Zwolak, M., DNA Electronics; Nalwa, H.S. Ed.; American Scientific Publishers, Stevenson Ranch CA (in press 2004);Google Scholar
Endres, R.-G. et al. , Rev. Mod. Phys. 76, 195 (2004).Google Scholar
2. Fink, H.-W. and Schonenberger, , Nature 398, 407 (1999).Google Scholar
3. Porath, D., et al., Nature 403, 635 (2000).Google Scholar
4. Tran, P. et al, Phys. Rev. Lett. 85, 1564 (2000).Google Scholar
5. Yoo, K.-H., et al, Phys. Rev. Lett. 87, 198102 (2001).Google Scholar
6. Vedala, H. Roy, S. Doud, M. Mathee, K. Hwang, S. Jeon, M. Choi, W.. Nanotechnology, 19:265704 (2008)Google Scholar
7. Guo, X. Gorodetsky, A. A. Hone, J. Barton, J. K. and Nuckolls, C. Nature Nanotechnology, 3:163 (2008).Google Scholar
8. Singh, Mahi R., J. Biomaterial. Sc. 15, 1533 (2004).Google Scholar
9. Singh, M., Bart, G. and Zinke-Allmang, M., Nanoscale Research Letters 5, 501 (2010).Google Scholar
10. Mott, N. F. and Davis, E. A., Electronic Processes in Non-Crystalline Solids (Oxford University, London, (1971).Google Scholar
11. Martens, H. Blom, P. and Schoo, H.. Physcal Review B, 61:7489, 2000 Google Scholar
12. Thamilselvan, M. Premnazeer, K. Mangalaraj, D. and Narayandass, Sa. K.. Physca B, 337:404 (2003)Google Scholar
13. Rerbal, K. Chazalviel, J.-N. Ozanam, F. and Solomon, I.. Journal of Non-Crystalline Solids, 299, 585 (2002).Google Scholar
14. Benkhedir, M. L. Brinza, M. Qamhieh, N. and Adriaenssens, G. J.. Journal of Non-Crystalline Solids, 352, 1543 (2006).Google Scholar