Effects of gamma-ray irradiation on the electrical conductivity and photoresponse have been studied for single-stranded DNA (ssDNA)/single-walled carbon nanotube (SWNT) composite films. The temperature-dependent electrical conductivity of the ssDNA/SWNT composite films, well described by a fluctuation-induced tunneling model, indicated modification of the barrier for thermally activated conduction by the gamma-ray irradiation. Besides, the photoresponse measurements indicated modified photoexcited charge carrier generation and oxygen photodesorption in the composite systems due to the gamma-ray irradiation.
|Number of pages
|Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
|Published - 2015 Apr 15
Bibliographical noteFunding Information:
This work was supported by the National Research Foundation of Korea (Proton Users Program Project No. 2014M2B2A4030835, 2014028954, and NRF-2010–0027963). The measurements at the Korean Basic Science Institute (KBSI) are acknowledged.
© 2015 Elsevier B.V. All rights reserved.
- Charge transport and photoresponses
- Gamma-ray irradiation effect
- Single-stranded DNA/single-walled carbon
- nanotube composite film
ASJC Scopus subject areas
- Nuclear and High Energy Physics