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28 Jan 2002

Volume 80, Issue 4, pp. 535-701

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Self-assembled dye-DNA network and its photoinduced electrical conductivity

Jianhua Gu, Shinnichi Tanaka, Youichi Otsuka, Hitoshi Tabata, and Tomoji Kawai

Appl. Phys. Lett. 80, 688 (2002); http://dx.doi.org/10.1063/1.1435805 (3 pages) | Cited 15 times

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DNA molecules [poly(dG-dC).poly(dG-dC)] were modified with acridine orange (AO). Direct measurement of the electrical characteristics of the AO-DNA network were performed using a conducting atomic-force microscope (AFM) with a gold coated tip, a second gold electrode being electrically contacted to the dye-DNA/mica surface. Enhancement of electrical conductivity was observed while irradiating the sample with visible light. The results indicated that excited AO obtains an electron from the G site and eventually a hole is generated. © 2002 American Institute of Physics.
Show PACS
87.14.G- Nucleic acids
87.64.Dz Scanning tunneling and atomic force microscopy
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