Photoconductivity and current-voltage characteristics of thin DNA films: Experiments and modeling


Journal Article

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. © 2009 SPIE.

Full Text

Duke Authors

Cited Authors

  • Venkatramani, R; Zang, DY; Oh, C; Grote, J; Beratan, D

Published Date

  • January 1, 2009

Published In

Volume / Issue

  • 7403 /

International Standard Serial Number (ISSN)

  • 0277-786X

Digital Object Identifier (DOI)

  • 10.1117/12.831024

Citation Source

  • Scopus