Comparison of sterilizing effect of nonequilibrium atmospheric-pressure He/O2 and Ar/O2 plasma jets

被引：0
|
作者：
Li Shouzhe [1 ]
Lim Jinpyo [2 ]
机构：
[1] Dalian Univ Technol, Sch Phys & Optoelect Engn, State Key Lab Mat Modificat Laser Ion & Elect Bea, Dalian 116024, Peoples R China
[2] Ajou Univ, Dept Mol Sci & Technol, Suwon 443749, South Korea
来源：
PLASMA SCIENCE & TECHNOLOGY | 2008年 / 10卷 / 01期
关键词：
atmospheric pressure; plasma jet; sterilization; DECONTAMINATION;
D O I：
暂无
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
The sterilizing effect of the non-equilibrium atmospheric pressure plasma jet by applying it to the Bacillus subtilis spores is invesigated. A stable glow discharge in argon or helium gas fed with active gas (oxygen), was generated in the coaxial cylindrical reactor powered by the radio-frequency power supply at atmospheric pressure. The experimental results indicated that the efficiency of killing spores by making use of an Ar/O-2 plasma jet was much better than with a He/O-2 plasma jet. The decimal reduction value of Ar/O-2 and He/O-2 plasma jets under the same experimental conditions was 4.5 seconds and 125 seconds, respectively. It was found that there exists an optimum oxygen concentration for a certain input power, at which the sterilization efficiency reaches a maximum value. It is believed that the oxygen radicals are generated most efficiently under this optimum condition.
引用
收藏
页码：61 / 64
页数：4
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