title: Electrical conduction in macroscopically oriented deoxyribonucleic and hyaluronic acid samples.
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) - 10(6) Hz 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 approximately 0.8 eV for both DNA and HA. We discuss the meaning of these findings for the possible conduction mechanism in these particular charged polyelectrolytes.
authors.affiliation: Department of Condensed Matter Physics, Jozef Stefan Institute, P.O. Box 3000, 1001 Ljubljana, Slovenia.
authors.forename: Zdravko
authors.initials: Z
authors.lastname: Kutnjak
authors.forename: Gojmir
authors.initials: G
authors.lastname: Lahajnar
authors.forename: Cene
authors.initials: C
authors.lastname: Filipic
authors.forename: Rudolf
authors.initials: R
authors.lastname: Podgornik
authors.forename: Lars
authors.initials: L
authors.lastname: Nordenskiöld
authors.forename: Nikolay
authors.initials: N
authors.lastname: Korolev
authors.forename: Allan
authors.initials: A
authors.lastname: Rupprecht
mesh_terms: D045424:Complex Mixtures / Q000032:analysis*; D004247:DNA / Q000032:analysis* / Q000737:chemistry*; D004553:Electric Conductivity; D004563:Electrochemistry / Q000379:methods*; D006820:Hyaluronic Acid / Q000032:analysis* / Q000737:chemistry*; D008968:Molecular Conformation; D009690:Nucleic Acid Conformation; D055672:Static Electricity; D013696:Temperature
chemical_list: D045424:Complex Mixtures; D006820:Hyaluronic Acid; D004247:DNA; C427203:calf thymus DNA