Electrical conduction in macroscopically oriented deoxyribonucleic and hyaluronic acid samples.
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.
Kutnjak
Zdravko
Z
Department of Condensed Matter Physics, Jozef Stefan Institute, P.O. Box 3000, 1001 Ljubljana, Slovenia.
Lahajnar
Gojmir
G
Filipic
Cene
C
Podgornik
Rudolf
R
Nordenskiöld
Lars
L
Korolev
Nikolay
N
Rupprecht
Allan
A
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
D045424:Complex Mixtures; D006820:Hyaluronic Acid; D004247:DNA; C427203:calf thymus DNA