Insulating behavior of λ-DNA on the micron scale

Y. Zhang, R. H. Austin, J. Kraeft, E. C. Cox, N. P. Ong

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Recently, two groups used electrostatic force microscopy to probe the electrostatic polarization of DNA. As such, the results were consistent with the findings that DNA is insulating. However, the electrostatic force-microscopy technique probes conductivity in the limit of weak bias potentials, so it does not rule out a transition to moderately large conductivity above a bias threshold of several volts. The presented experiments showed that insulating behavior extends to bias potentials as high as 20 V.

Original languageEnglish (US)
Article number198102
Pages (from-to)198102/1-198102/4
JournalPhysical review letters
Issue number19
StatePublished - Nov 4 2002

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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