Charge transport and photoresponses in a single-stranded DNA/single-walled carbon nanotube composite film

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[1] Hong, Wonseon
[2] Lee, Eunmo
[3] Park, Jun Kue
[4] Lee, Cheol Eui
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Lee, C.E. (rscel@korea.ac.kr) | 1600年 / American Institute of Physics Inc.卷 / 113期
关键词：
Electrical conductivity and photoresponse measurements have been carried out on a single-stranded DNA (ssDNA)/single-walled carbon nanotube (SWNT) composite film in comparison to those of a SWNT film. While the temperature-dependent electrical conductivity of the pristine SWNT film was described well by the combined mechanism of a three-dimensional variable-range hopping and hopping conduction; that of the ssDNA/SWNT composite film followed a fluctuation-induced tunneling model. Besides; competition of photoexcited charge carrier generation and oxygen adsorption/photodesorption in the photoresponses of the films was observed and discussed in view of the role of the DNA wrapping. Thus; the biopolymer coating of the SWNTs is shown to play a significant role in modifying the charge dynamics of the composite system. © 2013 AIP Publishing LLC;
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