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.
|Physical review letters
|Published - Nov 4 2002
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)