Assessment of the roles of various inactivation agents in an argon-based direct current atmospheric pressure cold plasma jet

Qian Zhang, Peng Sun, Hongqing Feng, Ruixue Wang, Yongdong Liang, Weidong Zhu, Kurt H. Becker, Jue Zhang, Jing Fang

Research output: Contribution to journalArticle

Abstract

Three types of gases, pure argon (99.999), argon with 2 oxygen, and argon with 2 oxygen and 10 nitrogen were used as operating gases of a direct current atmospheric pressure cold plasma jet to inactivate Staphylococcus aureus (S. aureus) suspended in a liquid. The inactivation efficacies for the plasma jets operating in the three gases decrease from Ar/O 2(2) to Ar/O 2(2)/N 2(10) to pure Ar. Optical emission spectroscopy, electron spin resonance spectroscopy, high performance liquid chromatography, and atomic absorption spectrophotometry were employed to identify and monitor the reactive species in the plasma-liquid system for the three operating gases and revealed the presence of O, 1O 2, OH, NO, H 2O 2, O 3, and NO 3 -/NO 2 - as well as Cu +/Cu 2. The S. aureus inactivation results indicate that atomic oxygen (O) is the key inactivation agent, while other species play a lesser role in the inactivation progress studied here.

Original languageEnglish (US)
Article number123305
JournalJournal of Applied Physics
Volume111
Issue number12
DOIs
StatePublished - Jun 15 2012

Fingerprint

cold plasmas
deactivation
plasma jets
atmospheric pressure
direct current
argon
staphylococcus
gases
oxygen
liquid chromatography
optical emission spectroscopy
spectrophotometry
liquids
electron paramagnetic resonance
nitrogen
spectroscopy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Assessment of the roles of various inactivation agents in an argon-based direct current atmospheric pressure cold plasma jet. / Zhang, Qian; Sun, Peng; Feng, Hongqing; Wang, Ruixue; Liang, Yongdong; Zhu, Weidong; Becker, Kurt H.; Zhang, Jue; Fang, Jing.

In: Journal of Applied Physics, Vol. 111, No. 12, 123305, 15.06.2012.

Research output: Contribution to journalArticle

Zhang, Qian ; Sun, Peng ; Feng, Hongqing ; Wang, Ruixue ; Liang, Yongdong ; Zhu, Weidong ; Becker, Kurt H. ; Zhang, Jue ; Fang, Jing. / Assessment of the roles of various inactivation agents in an argon-based direct current atmospheric pressure cold plasma jet. In: Journal of Applied Physics. 2012 ; Vol. 111, No. 12.
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