title: Electrical conduction in native deoxyribonucleic acid: hole hopping transfer mechanism?
abstract: Measurements of the quasistatic and frequency dependent electric conductivity below 1 MHz were carried out on wet-spun, macroscopically oriented, calf thymus DNA bulk samples, thus effectively extending previous radio frequency data down to quasistatic time scales. The frequency dependence of the electrical conductivity in the frequency range of approximately 10(-3)-10(15) Hz agrees well with predictions of the hopping hole mechanism. Temperature dependence of the quasistatic electrical conductivity can be rather well described by the activated Arrhenius law with the activation energy of approximately 0.9 eV; however, based on the quality of the fits, the hopping ansatz cannot be ruled out.
authors.affiliation: Jozef Stefan Institute, P.O. Box 3000, 1001 Ljubljana, Slovenia.
authors.forename: Zdravko
authors.initials: Z
authors.lastname: Kutnjak
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
mesh_terms: D000818:Animals; D010582:Bacteriophage lambda / Q000235:genetics; D002417:Cattle; D004247:DNA / Q000737:chemistry*; D004279:DNA, Viral / Q000737:chemistry; D004553:Electric Conductivity; D008094:Lithium / Q000737:chemistry; D013696:Temperature
chemical_list: D004279:DNA, Viral; D004247:DNA; D008094:Lithium