2021 Fiscal Year Final Research Report
Understanding of Plasma-induced Chemical Reactions at Gas-liquid Interface for the Safety of Plasma Medicine
| Project/Area Number |
19K14967
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 21010:Power engineering-related
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| Research Institution | Oita University |
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Principal Investigator |
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| Project Period (FY) |
2019-04-01 – 2022-03-31
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| Keywords | プラズマ－液体相互作用 / 気液界面プラズマ / 数値シミュレーション / 速度論的モデル / 分子動力学シミュレーション / 自由エネルギープロファイル / ハロゲン化物イオン |
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| Outline of Final Research Achievements |
We irradiated atmospheric pressure plasmas to sodium chloride, bromide, and iodide solutions, performed diffusion reaction simulations based on a kinetic model, and carried out molecular dynamics simulations to investigate gas-liquid interfaces from a microscopic viewpoint. These experiments and simulations indicated a possibility that short-lived active species generated by plasma were able to react with ions only around the topmost layer of the water surface. In addition, although characteristics of the gas-liquid interface, such as free energy profiles, distributions of ion concentrations, and charge density distributions, were not considered in conventional kinetic models, these characteristics would be probably important to better understand the plasma-induced chemical reactions at the gas-liquid interface.
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| Free Research Field |
プラズマ工学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の成果はプラズマ医療のメカニズム解明および安全性確立に大きく寄与するものだと考えられる。プラズマ医療とは物質の第4の状態であるプラズマを用いた新しい医療手法であり，病原菌の殺菌，がん細胞の死滅誘導，外傷の治療促進などが実現可能である。しかし，そのメカニズムへの理解が十分ではないため，安全性に懸念が持たれている。本研究の成果は，プラズマ医療のメカニズムに対して新たな知見をもたらすものであり，ひいてはプラズマ医療の安全性向上および実用化に大きく貢献するものだと考えている。
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