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The role of oxygen ...
The role of oxygen in a large area of RF-powered atmospheric pressure dielectric barrier glow discharge plasma in sterilization
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Pang, H. (författare)
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Chen, Q. (författare)
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- Li, Bin (författare)
- KTH,Rymd- och plasmafysik,Alfvénlaboratoriet
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Fei, F. (författare)
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Yang, S. (författare)
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(creator_code:org_t)
- 2011
- 2011
- Engelska.
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Ingår i: IEEE Transactions on Plasma Science. - 0093-3813. ; 39:8, s. 1689-1694
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- A nonequilibrium Ar/O2 plasma at atmospheric pressure was generated between two parallel square electrodes by a 13.56-MHz power supplier. Experimental results demonstrate that the Ar/O2 plasma more effectively kills Staphylococcus aureus and Escherichia coli than the Ar plasma. When the O2 flow rate increases from 0 to 100 sccm step by step, the discharge voltage and the radio-frequency (RF) current always show sinusoidal waveforms, and the discharges maintain the α mode as well. In addition, the sterilization efficiency values of the RF-powered atmospheric pressure Ar/O2 plasma depend on the oxygen fraction in Ar gas. It is found that the sterilization efficiency of the Ar/O2 plasma is highest with 0.5 vol.% oxygen in argon gas, corresponding to the maximum production of O(3P) radicals. It is considered that the O(3P) radicals produced by the Ar/O2 plasma play a significant role in atmospheric plasma sterilization.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- Oxygen radicals
- radio-frequency (RF)-powered atmospheric pressure plasma
- sterilization mechanisms
- Ar plasmas
- Argon gas
- Atmospheric plasmas
- Dielectric-barrier glow discharges
- Discharge voltages
- Non equilibrium
- Oxygen fractions
- Oxygen radical
- Power suppliers
- Radio frequencies
- Rate increase
- Sinusoidal waveforms
- Staphylococcus aureus
- Step-by-step
- Argon
- Atmospheric pressure
- Atmospherics
- Bacteria
- Escherichia coli
- Glow discharges
- Oxygen
- Sterilization (cleaning)
- Plasmas
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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