Effect of gas composition on surface sterilization by using LF-microwave hybrid plasma source
Effect of gas composition on surface sterilization by using LF-microwave hybrid plasma source
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气体成分对低频-微波混合等离子体源表面灭菌的影响
DOI：
10.7567/1347-4065/ab4614
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发表时间：
2019
影响因子：
1.5
通讯作者：
N. Hayashi
中科院分区：
文献类型：
--
作者：
Norrawit Tonmitr;A. Yonesu;N. Hayashi
将低频等离子体射流与微波等离子体混合，研制了一种新型的大气压低温等离子体源。LF-微波混合等离子体与常规LF等离子体射流相比具有大量的活性物质，这是由于较高能量的电子，其被微波的振荡电场加速。此外，在放电气体中的处理气体的组成比率较高时，可以稳定地维持。本研究的目的是利用自行设计的低频-微波混合等离子体源，研究混合气体成分对表面灭菌的影响。研究了放电气体中氧气和氩气的组成比对活性物种的产生和杀菌效果的影响。通过对发射光谱和化学指示剂反应的分析，发现氧氩混合放电气体中活性氧随氧比的增加而增加，当氧比达到10%时，活性氧饱和。相反，使用生物指示剂的灭菌试验的结果表明，混合物排放气体中氧的比例越低，获得的灭菌效果越高。据认为，活性物种，除了活性氧，与使用大气压非热等离子体的表面灭菌。
A new type of atmospheric-pressure non-thermal plasma source was developed by a combining a low-frequency (LF) plasma jet with microwave plasma as a hybrid plasma. The LF-microwave hybrid plasma has a large amount of reactive species compared to conventional LF plasma jet owing to higher-energy electrons, which are accelerated by the oscillating electric fields of the microwave. Moreover, it can be sustained stably at a higher composition rate of the process gas in the discharge gas. The objective of this study is to investigate the effect of the admixture gas composition on surface sterilization by using our self-designed LF-microwave hybrid plasma source. The influence of the discharge gas composition ratio between oxygen and argon on the production of the reactive species and sterilization effect was investigated. The analysis of the optical emission spectra and the reaction of the chemical indicators reveal that reactive oxygen increases with the increasing ratio of oxygen in the oxygen-argon admixture discharge gas up to an oxygen ratio of 10% and then it saturates. In contrast, the results of the sterilization test using biological indicators indicate that a higher sterilization effect was obtained for a lower ratio of oxygen in the admixture discharge gas. It is considered that reactive species, except reactive oxygen, are related to surface sterilization using atmospheric-pressure non-thermal plasma.
氧自由基对低压表面波等离子体灭菌的影响
DOI：
--
发表时间：
2005
期刊：
Applied Physics Letter (掲載予定)
影响因子：
--
作者：
L.Xu;P.Liu;R.J.Zhan;X.H.Wen;L.L.Ding;M.Nagatsu;M.Nagatsu;M.Nagatsu;M.Nagatsu;M.Nagatsu;L.Xu;M.Nagatsu;A.Ogino;M.Nagatsu;A.Ogino;L.Xu;H.Nonaka;M.Shido;T.Aoshi;M.Nagatsu
通讯作者：
M.Nagatsu