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

Perry P. Yaney; Timothy T. Gorman; Fahima Ouchen; James G. Grote

doi:10.1117/1.JNP.6.063531

27 November 2012 Time-of-flight studies of hole mobilities in DNA-CTMA films fabricated and passivated in a dry environment

Perry P. Yaney, Timothy T. Gorman, Fahima Ouchen, James G. Grote

Author Affiliations +

Journal of Nanophotonics, Vol. 6, Issue 1, 063531 (November 2012). https://doi.org/10.1117/1.JNP.6.063531

Abstract

Salmon DNA-based films, including as-received DNA (molecular weight, MW > 2000 kDa) and sonicated DNA of MW ~200 kDa, 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 ppm_v 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 5Ε-5 cm² / Vs for fields ranging from 10 to 380 kV / 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.

Citation Download 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," Journal of Nanophotonics 6(1), 063531 (27 November 2012). https://doi.org/10.1117/1.JNP.6.063531

Published: 27 November 2012

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available