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Thermoelectric effect and its dependence on molecular length and sequence in single DNA molecules

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  • Yueqi Li

    (Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University
    School of Molecular Sciences, Arizona State University)

  • Limin Xiang

    (Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University
    School of Molecular Sciences, Arizona State University)

  • Julio L. Palma

    (Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University
    School of Molecular Sciences, Arizona State University)

  • Yoshihiro Asai

    (Research Center for Computational Design of Advanced Functional Materials (CD-FMat), National Institute of Advanced Industrial Science and Technology (AIST))

  • Nongjian Tao

    (Center for Bioelectronics and Biosensors, Biodesign Institute, Arizona State University
    School of Chemistry and Chemical Engineering, Nanjing University)

Abstract

Studying the thermoelectric effect in DNA is important for unravelling charge transport mechanisms and for developing relevant applications of DNA molecules. Here we report a study of the thermoelectric effect in single DNA molecules. By varying the molecular length and sequence, we tune the charge transport in DNA to either a hopping- or tunnelling-dominated regimes. The thermoelectric effect is small and insensitive to the molecular length in the hopping regime. In contrast, the thermoelectric effect is large and sensitive to the length in the tunnelling regime. These findings indicate that one may control the thermoelectric effect in DNA by varying its sequence and length. We describe the experimental results in terms of hopping and tunnelling charge transport models.

Suggested Citation

  • Yueqi Li & Limin Xiang & Julio L. Palma & Yoshihiro Asai & Nongjian Tao, 2016. "Thermoelectric effect and its dependence on molecular length and sequence in single DNA molecules," Nature Communications, Nature, vol. 7(1), pages 1-8, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11294
    DOI: 10.1038/ncomms11294
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