A battery-operated atmospheric-pressure plasm a rod for biomedical applications

In the past decade room-temperature atmospheric pressure plasma jets (RT-APPJs) have attracted a lot of attention due to their applications in the field of health care and medicine, including bacteria inactivation, blood coagulation, wound healing, teeth whitening, and tooth root canal treatment^1-4. To fulfill the specific requirements of various applications, many different types of RT-APPJs with different designs and driven by different power sources, including kHz AC, RF, microwave, pulsed DC and DC voltages, have been developed. On the other hand, external power sources (e.g., wall power or power generator) are needed for all these devices. In addition, most of these devices also need gas supply (e.g., He, Ar). Furthermore, for applications where bacteria, fungi, or viruses are hidden in narrow channels such as nasal cavity and ear canal, most of the currently available devices are not suitable for such situations.