Figure 1.

Cold atmospheric plasma (CAP) generated by dielectric-barrier discharge (DBD). (A) Schematic diagram of the DBD plasma device. (B) A photograph showing the plasma torch and its associated power supply used in this study. The plasma jet was placed on the clean bench, and all the experiments were conducted in the hood. (C) Representative image of cold atmospheric plasma jet using helium gas. The power was adjusted to 300 W, and the flow rate of helium (He) gas was 20 L per minute. (D) After CAP application to the medium, the temperature was measured at the indicated time.