Journal
PLASMA PROCESSES AND POLYMERS
Volume 9, Issue 2, Pages 157-164Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ppap.201100041
Keywords
Bacillus subtilis; electron spin resonance; plasma activated water; plasma microjet
Funding
- Bioelectrics Inc. (USA)
- MST of International Science and Technology Cooperation [2009DFB30370]
- National Basic Research Program [2007CB935602]
- American Chemical Society
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Bacillus subtilis spores suspended in distilled water was effectively inactivated in 6?min by a direct-current atmospheric pressure non-thermal air plasma microjet. Scanning electron microscopic images show clear distortion and debris of spores after plasma treatment. Direct contribution by temperature and pH change of water as well as relatively long lived species in plasma activated water (PAW) is excluded. Short lived species (such as center dot OH, center dot O?2- and O2(1 Delta g)) are detected in the plasma-water system by electron spin resonance spectroscopy, and are considered to be the most important agents in the inactivation process.
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