A comparison of different cold atmospheric pressure plasma jets for biomedical applications: Gas temperature, morphology, power dissipation and biological activity

Summary form only given. The goal of plasma induced healing is to obtain a high bacteria killing rate without significant damage of the healthy cells. For this task various cold atmospheric pressure plasma jets (APPJ´s) have been developed over the years. In those APPJ´s the plasma is created with an inert gas inside a ceramic or glass tube between two electrodes. The effluent mixes outside with the air-environment. APPJ´s differ usually in electrode geometry (ring, needle), used gas-effluent (helium, argon) and excitation frequency (DC, kHz, MHz). These differences in input parameters are also changing the plasma parameters, such as the gas temperature, UV-emission and production of reactive species, which makes a direct comparison of the plasma jets challenging and contributes to the large discrepancies between biomedical experiments of different groups using (slightly) different plasma jets¹.