Electrical conduction through poly(dA)-poly(dT) and poly(dG)-poly(dC) DNA molecules

D. H. Ha, J. W. Park, Jinhee Kim, J. J. Kim, H. Y. Lee, T. Kawai, Han Yong Choi, K. H. Yoo, J. O. Lee

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Abstract

We report direct measurements of electrical transport through poly(dA)-poly(dT) and poly(dG)-poly(dC) DNA molecules containing identical base pairs. The observed experimental results suggest that electrical transport through DNA molecules occurs by polaron hopping. We have also investigated the effect of gate voltage on the current-voltage curve. It demonstrates the possibility of a DNA field-effect transistor operating at room temperature. Moreover, the gate-voltage dependent transport measurements show that poly(dA)-poly(dT) behaves as an n-type semiconductor, whereas poly(dG)-poly(dC) behaves as a p-type semiconductor.

Original languageEnglish
Number of pages1
JournalPhysical review letters
Volume87
Issue number19
Publication statusPublished - 2001 Nov 5

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Ha, D. H., Park, J. W., Kim, J., Kim, J. J., Lee, H. Y., Kawai, T., Choi, H. Y., Yoo, K. H., & Lee, J. O. (2001). Electrical conduction through poly(dA)-poly(dT) and poly(dG)-poly(dC) DNA molecules. Physical review letters, 87(19).