The Role of Oxygen in a Large Area of RF-Powered Atmospheric Pressure Dielectric Barrier Glow Discharge Plasma in Sterilization

被引：13

作者：

Pang, Hua ^{[1
]}

Chen, Qiang ^{[2
]}

Li, Bin ^{[2
]}

Fei, Fei ^{[2
]}

Yang, Size ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China

[2] Beijing Inst Graph Commun, Lab Plasma Phys & Mat, Beijing 102600, Peoples R China

[3] Xiamen Univ, Fujian Key Lab Plasma & Magnet Resonance, Dept Aeronaut, Sch Phys & Mech & Elect Engn, Xiamen 361005, Peoples R China

来源：

IEEE TRANSACTIONS ON PLASMA SCIENCE | 2011年 / 39卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Oxygen radicals; radio-frequency (RF)-powered atmospheric pressure plasma; sterilization mechanisms; LOW-TEMPERATURE PLASMA; ESCHERICHIA-COLI; RADIOFREQUENCY;

D O I：

10.1109/TPS.2011.2155104

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：

A nonequilibrium Ar/O-2 plasma at atmospheric pressure was generated between two parallel square electrodes by a 13.56-MHz power supplier. Experimental results demonstrate that the Ar/O-2 plasma more effectively kills Staphylococcus aureus and Escherichia coli than the Ar plasma. When the O-2 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 a mode as well. In addition, the sterilization efficiency values of the RF-powered atmospheric pressure Ar/O-2 plasma depend on the oxygen fraction in Ar gas. It is found that the sterilization efficiency of the Ar/O-2 plasma is highest with 0.5 vol.% oxygen in argon gas, corresponding to the maximum production of O(P-3) radicals. It is considered that the O(P-3) radicals produced by the Ar/O-2 plasma play a significant role in atmospheric plasma sterilization.

引用

页码：1689 / 1694

页数：6

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