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

页码：61 / 64

页数：4

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