Surface sterilization using LF-microwave hybrid plasma, which is a low-frequency (LF) plasma jet assisted by a microwave discharge, was investigated. Hybrid plasma is an atmospheric pressure non-thermal plasma and has a large number of reactive species. To improve the performance of surface sterilization using LF-microwave hybrid plasma, two types of discharge gas supply systems were employed. The first type (Type I) introduces argon and oxygen gas flows separately into the discharge region. The second type (Type II) introduces a mixture of two gases into the discharge region. The analysis of optical emission spectra and chemical indicators showed that more reactive oxygen species were produced by the Type II gas supply system compared to that by Type I. Moreover, a lower gas temperature was obtained with the Type II system compared to that with Type I. The results of the sterilization test show that a higher sterilization effect was obtained for the gas supply system Type II. T...

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使用LF-微波混合等离子体进行表面灭菌

研究了使用LF-微波混合等离子体进行的表面灭菌，LF-微波混合等离子体是通过微波放电辅助的低频（LF）等离子体射流。混合等离子体是大气压非热等离子体，具有大量的反应物种。为了提高使用LF-微波混合等离子体进行表面灭菌的性能，采用了两种类型的放电气体供应系统。第一种类型（I型）将氩气和氧气流分别引入放电区域。第二种类型（II型）将两种气体的混合物引入放电区域。对光发射光谱和化学指示剂的分析表明，与I型气体供应系统相比，II型气体供应系统产生的活性氧种类更多。与类型I相比，类型II的系统获得的气体温度更低。灭菌测试的结果表明，类型II的气体供应系统获得了更高的灭菌效果。T ...