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Proceedings Paper

Studies of charge transport in DNA films using the time-of-flight (TOF) technique
Author(s): Perry P. Yaney; Timothy Gorman; Fahima Ouchen; James G. Grote
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Paper Abstract

Measurements were carried out on salmon DNA-based films, including as-received DNA (molecular weight, MW>2000 kDa) without and with hexacetyltrimethl-ammonium chloride (CTMA) surfactant, and sonicated DNA of MW~200 kDa with CTMA. The test specimens were spin-coated or drop-cast films on ITO-coated quartz slides with a gold charge-collecting electrode. To protect the films from atmospheric influences, the TOF devices were coated with a 200-400 nm polyurethane passivation layer. A quadrupled 20 ns, pulsed Nd:YAG laser with output at 266 nm was used for charge injection. The room temperature photoconductive transients were dispersive to varying degrees with hole mobilities in DNA materials films ranging between 2E-5 to 6E-3 cm2/Vs for fields ranging from 8 to 58 kV/cm. Only hole response was observed in DNA. The dispersive data were analyzed using a simple, quasi-empirical equation for the photocurrent transient data.

Paper Details

Date Published: 15 September 2011
PDF: 7 pages
Proc. SPIE 8103, Nanobiosystems: Processing, Characterization, and Applications IV, 81030H (15 September 2011); doi: 10.1117/12.896484
Show Author Affiliations
Perry P. Yaney, Univ. of Dayton (United States)
Timothy Gorman, Univ. of Dayton (United States)
Air Force Research Lab. (United States)
Fahima Ouchen, Air Force Research Lab. (United States)
James G. Grote, Air Force Research Lab. (United States)

Published in SPIE Proceedings Vol. 8103:
Nanobiosystems: Processing, Characterization, and Applications IV
Norihisa Kobayashi; Fahima Ouchen; Ileana Rau, Editor(s)

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