Atmospheric pressure cold plasma generated using a radio frequency hollow cathode (RFHC) device recently showed its potent virucidal characteristics. For this purpose, the atmospheric pressure cold plasma of Ar was generated with a specially designed electrode using RF (13.56 MHz) power. In order to establish a correlation between the generated plasma species and its virucidal activity, systematic optical emission spectroscopy (OES) investigations were conducted on the plasma. OES studies revealed that the generated plasma using this device shows the emission of important species in the ultraviolet (UV) region and reactive oxygen species (ROS) in the optimized operation condition, required for virucidal action. Furthermore, investigations revealed that similar active species can be generated by placing a commercial nebulizer in front of plasma. Investigations conducted on the aerosol capturing efficiency of N-95 mask revealed that cold plasma treatment leaves functional aspects of this medical personal protection equipment (PPE) unchanged. The results indicate that such an RF-HC device in combination with a nebulizer for introducing water mist in plasma can effectively destroy bacteriophage of Aeromonas bacteria at low operating power (70–90 W).

中文翻译：

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水蒸气对射频空心阴极冷等离子体杀病毒行为的影响：发射光谱研究


使用射频空心阴极（RFHC）装置产生的大气压冷等离子体最近显示出其有效的杀病毒特性。为此，使用射频（13.56 MHz）功率通过专门设计的电极产生大气压冷氩等离子体。为了建立所产生的等离子体种类与其杀病毒活性之间的相关性，对等离子体进行了系统的光学发射光谱（OES）研究。 OES 研究表明，使用该设备产生的等离子体显示出在优化操作条件下紫外线 (UV) 区域的重要物质和活性氧 (ROS) 的发射，这是杀病毒作用所需的。此外，研究表明，通过在等离子体前放置商用雾化器可以产生类似的活性物质。对 N-95 口罩的气溶胶捕获效率进行的调查表明，冷等离子体处理使这种医疗个人防护设备 (PPE) 的功能方面保持不变。结果表明，这种 RF-HC 装置与在等离子体中引入水雾的雾化器相结合，可以在低操作功率（70-90 W）下有效破坏气单胞菌的噬菌体。