Electrical conduction and photoresponses of gamma-ray-irradiated single-stranded DNA/single-walled carbon nanotube composite systems

W. Hong, E. M. Lee, D. W. Kim, Cheol Eui Lee

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)103-105
Number of pages3
JournalNuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
Volume349
DOIs
Publication statusPublished - 2015 Apr 15

Bibliographical note

Funding 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.

Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.

Keywords

  • 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
  • Instrumentation

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