Characteristics of surface sterilization using electron cyclotron resonance plasma

被引：5
|
作者：
Yonesu, Akira [1 ]
Hara, Kazufumi [1 ]
Nishikawa, Tatsuya [1 ]
Hayashi, Nobuya [2 ]
机构：
[1] Univ Ryukyus, Dept Elect & Elect Engn, Nishihara, Okinawa 9030213, Japan
[2] Kyushu Univ, NInterdisciplinary Grad Sch Engn Sci, Kasuga, Fukuoka 8168586, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2016年 / 55卷 / 07期
关键词：
LOW-TEMPERATURE STERILIZATION; DIELECTRIC BARRIER DISCHARGE; PRESSURE MICROWAVE PLASMAS; OXYGEN PLASMA; INACTIVATION; RADICALS; AIR; MECHANISMS; RADIATION;
D O I：
10.7567/JJAP.55.07LG08
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The characteristics of surface sterilization using electron cyclotron resonance (ECR) plasma were investigated. High-energy electrons and oxygen radicals were observed in the ECR zone using electric probe and optical emission spectroscopic methods. A biological indicator (BI), Geobacillus stearothermophilus, containing 1 x 10(6) spores was sterilized in 120 s by exposure to oxygen discharges while maintaining a temperature of approximately 55 degrees C at the BI installation position. Oxygen radicals and high-energy electrons were found to be the sterilizing species in the ECR region. It was demonstrated that the ECR plasma could be produced in narrow tubes with an inner diameter of 5mm. Moreover, sterilization tests confirmed that the spores present inside the narrow tube were successfully inactivated by ECR plasma irradiation. (C) 2016 The Japan Society of Applied Physics
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页数：4
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