Effects of proton irradiation on single-stranded DNA studied by using X-ray photoelectron spectroscopy

E. Lee, Cheol Eui Lee, J. H. Han

Research output: Contribution to journalArticlepeer-review

Abstract

X-ray photoelectron spectroscopy (XPS) has been employed in order to study the effects of proton irradiation on herring sperm single-stranded DNA. Systematic changes of the chemical shifts in the C, N, O, and P XPS line components as functions of the irradiation dose were observed, indicative of the bonding configurations in the DNA system. While the C 1s XPS lines showed weak blueshifts, the N 1s, O 1s, and P 2p XPS lines showed blueshifts with a marked dependence on the irradiation dose in a prominent manner. Our results show that linear energy transfer by charged particles and photons may have distinct molecular-level effects as the C 1s, N 1s, O 1s, and P 2p XPS lines showed redshifts in our previous study of effects of the γ-ray irradiation on the same system.

Original languageEnglish
Pages (from-to)578-583
Number of pages6
JournalJournal of the Korean Physical Society
Volume69
Issue number4
DOIs
Publication statusPublished - 2016 Aug 1

Keywords

  • Proton irradiation effect
  • Single-stranded DNA
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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