[18a-A205-1~6] 8.5 Plasma phenomena, emerging area of plasmas and their new applications

△ [18a-A205-5] Experimental Detection of Short-Lived Reactive Nitrogen Species Decay Using Plasma-Exposed High-Speed Water Flow

〇Kazuki Takeda¹, Shota Sasaki¹, Keisuke Takashima¹, Toshiro Kaneko¹ (1.Grad. Sch. of Eng., Tohoku Univ.)

Keywords:Atmospheric-pressure plasma, Plasma in contact with liquid, Reactive nitrogen species

Atmospheric pressure plasmas in contact with liquid have been drawing attention. When we contact plasma to liquid, it forms unique reaction fields by short-lived reactive nitrogen and oxygen species (RONS) at the plasma-liquid interface. However, the spatiotemporal distribution of short-lived RONS can be hardly characterized due to its chain reaction network with surface localization.
In this study, we tried to build new experimental method using a plasma-exposed high-speed liquid flow (~ 10 m/s) in combination with p-hydroxy phenylacetic acid (p-HPA) as a nitrated reactive species scavenger. This new method enables us to detect the minor short-lived reactive nitrogen species in addition to OH radical.