A study of oxidative stress induced by non-thermal plasma-activated water for bacterial damage

Journal Article · Mon May 20 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4807133· OSTI ID:22162950

Zhang, Qian; Ma, Ruonan; Tian, Ying ^[1]; Liang, Yongdong; Feng, Hongqing ^[2]; Zhang, Jue; Fang, Jing ^[1]

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1. Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871 (China)
2. College of Engineering, Peking University, Beijing 100871 (China)

Ar/O{sub 2} (2%) cold plasma microjet was used to create plasma-activated water (PAW). The disinfection efficacy of PAW against Staphylococcus aureus showed that PAW can effectively disinfect bacteria. Optical emission spectra and oxidation reduction potential results demonstrated the inactivation is attributed to oxidative stress induced by reactive oxygen species in PAW. Moreover, the results of X-ray photoelectron spectroscopy, atomic absorption spectrometry, and transmission electron microscopy suggested that the chemical state of cell surface, the integrity of cell membrane, as well as the cell internal components and structure were damaged by the oxidative stress.

• OSTI ID: 22162950
• Journal Information: Applied Physics Letters, Vol. 102, Issue 20; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION SPECTROSCOPY
ATOMIZATION
BIOLOGICAL EFFECTS
CELL MEMBRANES
CHEMICAL STATE
COLD PLASMA
DAMAGE
EMISSION SPECTRA
INACTIVATION
OXIDATION
PLASMA JETS
STAPHYLOCOCCUS
STERILIZATION
STRESSES
SURFACES
TRANSMISSION ELECTRON MICROSCOPY
WATER
X-RAY PHOTOELECTRON SPECTROSCOPY