Investigation of chemically reactive field in liquid induced by plasma exposure

2015 Fiscal Year Final Research Report

• Project/Area Number: 25390107
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Plasma electronics
• Research Institution: Kanazawa University
• Principal Investigator: Ishijima Tatsuo 金沢大学, 学内共同利用施設等, 准教授 (00324450)
• Co-Investigator(Kenkyū-buntansha): UESUGI Yoshihiko 金沢大学, 理工研究域, 教授 (90213339) ; TANAKA Yasunori 金沢大学, 理工研究域, 教授 (90303263)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 反応性プラズマ / プラズマ－液体相互作用 / 液中・液界面反応 / OHラジカル / 化学プローブ / 発光分光計測

Outline of Final Research Achievements

Recently, there has been much attention in plasma-liquid interactions. Especially, Atmospheric pressure plasma jet(APPJ) has been widely investigated since it can generate reactive chemical species (radicals) in liquid medium easily. These radicals react with and give some effects to treated objects. Therefore, it is important to detect radicals in liquid and understand generation mechanism. To achieve this aim, we have investigated the correlation between APPJ characteristic in gas phase and chemical species in liquid. We adopted a schlieren method and optical emission spectroscopy. We also used a chemical probe method to measure chemical species induced in liquid. In conclusion, O2 gas admixture enhances OH generation rate in liquid, although OH optical emission intensity depletes, suggesting that excited OH radical in gas phase is not a key chemical species to produce OH in liquid and chemically reactive oxygen species originated from O2 gas enhances OH generation rate in liquid.

Free Research Field

プラズマ応用