[5p-S22-3~4] 8.8 Plasma Electronics English Session

▲ [5p-S22-4] Attempt of Liquid-Phase Material Processing Using Atmospheric-Pressure Glow Discharge Electrolysis

〇Fumiyoshi Tochikubo¹, Yuya Yamazaki¹, Takumi Hanawa¹, Naoshi Kitakaze¹, Naoki Shirai², Satoshi Uchida¹ (1.Tokyo Metropolitan Univ., 2.Hokkaido Univ.)

Keywords:glow discharge electrolysis

Atmospheric-pressure dc glow discharge with liquid electrode is studied aiming the application for material processing in liquid such as metal nanoparticles (NPs) synthesis and surface modification. In these systems, the reactions in liquid are started by the electron/ion irradiation of the liquid surface or the dissolution of radical species from gas discharge plasma. Therefore, we can control various parameters in the gas phase as well as the parameters in the liquid for the process optimization. In this work, we report on our recent attempts on the NPs synthesis and surface modification in liquid using atmospheric-pressure glow discharge electrolysis. For nanoparticle synthesis, HAuCl4 aqueous solution, AgNO3 aqueous solution, HPtCl4 aqueous solution are used for Au NPs, Ag NPs, and Pt NPs, respectively. In the attempt to synthesize NPs with core-shell structure, the rectangular container was divided into two regions by cation-exchange membrane; the two regions were filled with different aqueous solutions. Only specific cation can pass through the cation-exchange membrane. In the surface modification of polymer material in liquid, a specimen made of polypropylene (PP) was set in NaCl aqueous solution, which also works as liquid electrode of the glow discharge. The surface of PP was investigated by FT-IR after treatment in addition to the measurement of water contact angle.