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Conductivity of single-stranded and double-stranded deoxyribose nucleic acid under ambient conditions: The dominance of water.
Appl. Phys. Lett. 88:102102 (2006)
Verlagsversion
DOI
We investigate the conductivity of single-stranded and double-stranded herring deoxyribose nucleic acid(DNA) in buffer solution spotted and dried on Aunanocontacts. We find an exponential increase of the conductivity with increasing humidity that is identical for single- and double-stranded DNA within the measurement accuracy. While the small conductivity of dry DNA is comparable to that of a large band-gap semiconductor, we attribute the increase at high humidity levels to water molecules accumulated at the phosphate backbone. For high humidities we observe s-shaped current-voltage characteristics that can be well explained by the dissociation of water attached to the DNA molecules.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
ISSN (print) / ISBN
0003-6951
e-ISSN
1077-3118
Zeitschrift
Applied Physics Letters
Quellenangaben
Band: 88,
Heft: 10,
Artikelnummer: 102102
Verlag
American Institute of Physics (AIP)
Nichtpatentliteratur
Publikationen
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Experimental Genetics (IEG)