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Electrical conduction in macroscopically oriented deoxyribonucleic and hyaluronic acid samples

Zdravko Kutnjak*, Gojmir Lahajnar, and Cene Filipič

Rudolf Podgornik

Lars Nordenskiöld, Nikolay Korolev, and Allan Rupprecht

  • Department of Condensed Matter Physics, Jožef Stefan Institute, P.O. Box 3000, 1001 Ljubljana, Slovenia

  • Department of Physics, University of Ljubljana, Jadranska 19, 1000 Ljubljana, Slovenia and Department of Theoretical Physics, Jožef Stefan Institute, P.O. Box 3000, 1001 Ljubljana, Slovenia

  • Division of Physical Chemistry Arrhenius Laboratory, Stockholm University S-106 91 Stockholm, Sweden

  • *URL: http://www2.ijs.si /∼kutnjak
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Phys. Rev. E 71, 041901 – Published 4 April, 2005

DOI: https://doi.org/10.1103/PhysRevE.71.041901

Abstract

Measurements of the quasistatic and frequency dependent electrical conductivity below 1 MHz were carried out on wet-spun, macroscopically oriented, calf thymus deoxyribonucleic (DNA) and umbilical cord hyaluronic acid (HA) bulk samples. The frequency dependence of the electrical conductivity in the frequency range of approximately 10−3–106Hz of both materials is surprisingly rather similar. Temperature dependence of the quasistatic electrical conductivity above the low temperature saturation plateau can be well described by the activated Arrhenius law with the activation energy of ≈0.8eV for both DNA and HA. We discuss the meaning of these findings for the possible conduction mechanism in these particular charged polyelectrolytes.

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Phys. Rev. E 71, 041901– Published 4 April, 2005
  • Received 18 June 2004

© 2005 American Physical Society

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