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Detection of solvated electrons and challenge to their kinetics in liquids interacting with plasmas

Research Project

Project/Area Number 19K21861
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 14:Plasma science and related fields
Research InstitutionHokkaido University

Principal Investigator

Sasaki Koichi  北海道大学, 工学研究院, 教授 (50235248)

Project Period (FY) 2019-06-28 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2020: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Keywords溶媒和電子 / CTTS遷移 / 光励起脱溶媒和 / プラズマ・液体相互作用 / プラズマ液体相互作用
Outline of Research at the Start

溶媒和電子を検出し,その反応kineticsを研究するための方法として,1) CTTS (Charge Transfer to Solvent)遷移を用いた溶媒和電子の生成と光吸収による検出(ポンプ・プローブ法),および,2)光励起脱溶媒和によって発生する自由電子の検出およびポンプ・プローブ法との組み合わせ,の二つの方法を開発し,プラズマ・液体相互作用研究において有用な実験技術として確立する。

Outline of Final Research Achievements

We developed two methods for detecting solvated electrons in liquids interacting with plasmas. One was the CTTS (Charge Transfer to Solvent) transition. This is a kind of photo-excited process to produce solvated electrons, and we can examine the reaction frequency of solvated electrons in liquids interacting with plasmas. The other method was the production of free electrons by laser-induced desolvation. The free electrons produced by the desolvation were transported to and detected in the plasma. We have shown experimentally that these two methods works effectively for investigating solvated electrons in liquids interacting with plasmas.

Academic Significance and Societal Importance of the Research Achievements

プラズマと相互作用する液体中に存在する溶媒和電子は,プラズマ誘起反応に決定的な影響を与えると考えられるにもかかわらず,本研究以前にはそれを研究するための実験技術がほとんどなく,手出しできない研究課題となっていた。本研究で開発した方法により,プラズマと相互作用する液体中に存在する溶媒和電子を実験的に研究することができるようになった。今後,本研究で開発した方法が研究コミュニティに普及すれば,プラズマと液体の相互作用に関する研究が進展すると考えられる。

Report

(3 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2021 2020 2019

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (9 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Journal Article] Reactivity of solvated electrons in ionic liquid interacting with low-pressure plasmas2020

    • Author(s)
      Y. Inagaki and K. Sasaki
    • Journal Title

      Jpn J. Appl. Phys.

      Volume: 59 Issue: 6 Pages: 066001-066001

    • DOI

      10.35848/1347-4065/ab8d4e

    • NAID

      120007042007

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reactivity of solvated electrons in ionic liquid interacting with low-pressure plasmas2020

    • Author(s)
      Y. Inagaki and K. Sasaki
    • Journal Title

      Jpn. J. Appl. Phys.

      Volume: -

    • NAID

      120007042007

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] プラズマ・液体相互作用における液相側現象理解のための実験技術の開発2021

    • Author(s)
      佐々木 浩一
    • Organizer
      第38回プラズマプロセシング研究会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] プラズマ液相界面における水和電子の光励起脱溶媒和による検出2021

    • Author(s)
      稲垣 慶修,佐々木 浩一
    • Organizer
      第38回プラズマプロセシング研究会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Change in discharge current of atmospheric-pressure helium glow discharge by photo-excited desolvation of hydrated electrons2020

    • Author(s)
      Y. Inagaki, K. Sasaki
    • Organizer
      73rd Annual Gaseous Electronics Conference
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Diagnostics of liquid-side phenomena in plasma-liquid interaction2020

    • Author(s)
      K. Sasaki
    • Organizer
      73rd Annual Gaseous Electronics Conference
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 水和電子の光励起脱溶媒和によるヘリウム大気圧グロー放電の放電電流変化2020

    • Author(s)
      稲垣 慶修,佐々木 浩一
    • Organizer
      第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] プラズマと相互作用する液体における溶媒和電子の検出と反応性2020

    • Author(s)
      稲垣 慶修,佐々木 浩一
    • Organizer
      第37回プラズマ・核融合学会年会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 溶媒和電子をプローブに使ったプラズマ誘起液相化学種の高空間分解密度分布計測への挑戦2020

    • Author(s)
      稲垣 慶修, 佐々木 浩一
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] Reaction frequencies of CTTS transition-induced solvated electrons in bulk region of ionic liquids irradiated with low-pressure Ar, O2, and N2 plasmas2019

    • Author(s)
      Y. Inagaki and K. Sasaki
    • Organizer
      XXXIV International Conference on Phenomena in Ionized Gases and the 10th International Conference on Reactive Plasmas
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 大気圧ヘリウムプラズマジェットが照射された水中における水和電子の反応周波数2019

    • Author(s)
      稲垣 慶修,佐々木 浩一
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2022-01-27  

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