Journal
APPLIED PHYSICS LETTERS
Volume 94, Issue 14, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3114407
Keywords
biological effects of ionising particles; microorganisms; plasma diagnostics; plasma jets
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Funding
- Korea Science and Engineering Foundation [2008-01011]
- National Research Foundation of Korea [2008-01011, 과C6B2606] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Bacterial inactivation experiment was performed using atmospheric pressure microplasma jets driven by radio-frequency wave of 13.56 MHz and by low frequency wave of several kilohertz. With addition of a ground ring electrode, the discharge current, the optical emission intensities from reactive radicals, and the sterilization efficiency were enhanced significantly. When oxygen gas was added to helium at the flow rate of 5 SCCM, the sterilization efficiency was enhanced. From the survival curve of Escherichia coli, the primary role in the inactivation was played by reactive species with minor aid from heat, UV photons, charged particles, and electric fields.
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