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Kleine-Ostmann, T.* ; Jördens, C.* ; Baaske, K.* ; Weimann, T.* ; Hrabě de Angelis, M. ; Koch, M.*

Conductivity of single-stranded and double-stranded deoxyribose nucleic acid under ambient conditions: The dominance of water.

Appl. Phys. Lett. 88:102102 (2006)

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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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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

ISSN (print) / ISBN 0003-6951

e-ISSN 1077-3118

Journal Applied Physics Letters

Quellenangaben Volume: 88, Issue: 10, Article Number: 102102

Publisher American Institute of Physics (AIP)

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Experimental Genetics (IEG)