Studies on a sinusoidally driven gas–liquid two-phase plasma discharge and its application to sterilization

Atmospheric pressure cold plasmas are widely used in the biomedical field as evidenced by developments recent years. In this study, a quartz tube-guided gas–liquid two-phase discharge has been configured with hollow needle-water structure. The power source for device was sinusoidal, and switching between miscible pure gaseous simple. It discovered that beneficial terms of reactant species generation reaction efficiency processing water. types particles, physicochemical properties, concentrations reactive oxygen nitrogen were studied spectroscopically. to have high levels H2O2 NO2−, activated water proven be effective at sterilizing samples contaminated micro-organisms. Key experimental parameters including driving voltage air flow rate optimized achieve best sterilization conditions. membrane potential changes treated bacteria also explore causes bacterial inactivation. results showed exhibited strong bactericidal effect mixed phase operating 17 kV 5 min gas 0.3 SLM. addition, present offers enhanced relative conventional plasma equipment and, therefore, wide range applications.