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Proceedings Paper

Photoconductivity and current-voltage characteristics of thin DNA films: experiments and modeling
Author(s): Ravindra Venkatramani; De Yu Zang; Choon Oh; James Grote; David Beratan
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Paper Abstract

We report experimental observations and theoretical modeling of an unusual photoelectric effect in deoxyribonucleic acid (DNA) thin-film devices, under visible and near-infrared illumination. The devices also show diode-type rectifying current-voltage (I-V) characteristics. An equivalent circuit model was constructed that fits the experimental data, and physical processes likely to arise in the devices are discussed. We envisage the formation of a Schottky barrier at the DNA film-metal interface and infer that the photoresponse arises from photoinjection of electrons from the metal into the DNA film.

Paper Details

Date Published: 20 August 2009
PDF: 12 pages
Proc. SPIE 7403, Nanobiosystems: Processing, Characterization, and Applications II, 74030B (20 August 2009); doi: 10.1117/12.831024
Show Author Affiliations
Ravindra Venkatramani, Duke Univ. (United States)
De Yu Zang, IPITEK, Inc. (United States)
Choon Oh, IPITEK, Inc. (United States)
James Grote, Air Force Research Lab. (United States)
David Beratan, Duke Univ. (United States)

Published in SPIE Proceedings Vol. 7403:
Nanobiosystems: Processing, Characterization, and Applications II
Norihisa Kobayashi; Fahima Ouchen; Ileana Rau, Editor(s)

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