Electrical Detection of ssDNA by Single Wall Carbon Nanotubes

ORAL

Abstract

We report conductance measurements of single-walled carbon nanotubes (SWNT) in the presense of single-stranded DNA (ssDNA). The characteristic I-V curves of our metallic SWNT samples changed from linear (ohmic) to non-ohmic in the presence of ssDNA dissolved in DI water, and remained so when the sample was dried. The results imply possible applications of SWNT in the electronic detection of ssDNA, detection of hybridization of ssDNA, and sequencing of DNA.

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Authors

  • Chih-kuan Tung

    Princeton University

  • Yuexing Zhang

    Argonne National Labs

  • N.P. Ong

    Department of Physics, Princeton University, Princeton University, Physics Dept., Princeton Univ.

  • Edward Cox

    Princeton University

  • Robert Austin

    Princeton University, Physics Department, Princeton University