On the other hand, liquid-phase plasma is not well known, although it has been used sparingly in
water treatment [1] and electrical discharge machining [2]. The fundamental properties of liquid-phase
plasma have not been determined, including its generation techniques, its state, and activated chemical
species in it. However, it would be reasonable to expect a higher reaction rate under lower-temperature
conditions with greater chemical reaction variability, since the molecular density of the liquid phase is
much higher than that of the gas phase.