Research Papers

Time-of-flight studies of hole mobilities in DNA-CTMA films fabricated and passivated in a dry environment

[+] Author Affiliations
Perry P. Yaney

University of Dayton, Department of Physics, Dayton, Ohio 45469-2314

Timothy T. Gorman

University of Dayton, Department of Physics, Dayton, Ohio 45469-2314

Fahima Ouchen

U.S. Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson AFB, Ohio 45433-7707

James G. Grote

U.S. Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson AFB, Ohio 45433-7707

J. Nanophoton. 6(1), 063531 (Nov 27, 2012). doi:10.1117/1.JNP.6.063531
History: Received August 10, 2012; Revised November 1, 2012; Accepted November 2, 2012
Text Size: A A A

Abstract.  Salmon DNA-based films, including as-received DNA (molecular weight, MW>2000kDa) and sonicated DNA of MW 200kDa, both complexed with hexacetyltrimethyl-ammonium chloride (CTMA) surfactant, were studied. The DNA solutions were spin-coated on indium tin oxide (ITO)-coated quartz slides with vacuum deposited gold charge-collecting electrodes. The films were fabricated entirely at 0% humidity (0 to 86 ppmv of water) in a nitrogen-purged glove box and coated with 500 to 600 nm passivating layers of conformal urethane before exposure to room air. 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 with hole mobilities in DNA films ranging between 7E-3 to 5E-5cm2/Vs for fields ranging from 10 to 380kV/cm. No electron response was observed in these films. The mobilities were determined from the transient curves at the intersections of initial and final tangent lines that defined the shoulders in the log-log plots. The results of these hole mobility studies, which appear to support predictions of high hole mobility in DNA, are the first on DNA-based films that were fabricated in a dry environment and passivated for measurements in room air.

Figures in this Article
© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Perry P. Yaney ; Timothy T. Gorman ; Fahima Ouchen and James G. Grote
"Time-of-flight studies of hole mobilities in DNA-CTMA films fabricated and passivated in a dry environment", J. Nanophoton. 6(1), 063531 (Nov 27, 2012). ; http://dx.doi.org/10.1117/1.JNP.6.063531


Tables

Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

PubMed Articles
Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.