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 journalArticle

1 Citation (Scopus)


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
Publication statusPublished - 2015 Apr 15



  • Charge transport and photoresponses
  • Gamma-ray irradiation effect
  • nanotube composite film
  • Single-stranded DNA/single-walled carbon

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this