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Dynamics of solution interface investigated by multiorder stimulated Raman scattering in colliding droplet

Research Project

Project/Area Number 19K05391
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 32010:Fundamental physical chemistry-related
Research InstitutionGakushuin University

Principal Investigator

Kohno Jun-ya  学習院大学, 理学部, 教授 (90557753)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords衝突液滴 / 高次誘導ラマン散乱 / 時間波形 / 液滴衝突 / 共振増強
Outline of Research at the Start

衝突液滴界面における高次誘導ラマン散乱の増強機構を,ラマン散乱光の時間プロファイルの測定から明らかにする。その結果を踏まえ,高次誘導ラマン散乱光をプローブとして液滴衝突界面のダイナミクスを,ナノ秒の時間分解能で追跡する。そのため,(1)高次誘導ラマン散乱波形観測装置の開発,(2)高次誘導ラマン散乱光生成機構の解明,(3)高次誘導ラマン散乱光を活用した液滴衝突反応の観測の順に研究を進める。

Outline of Final Research Achievements

Droplets act as optical cavities with high Q-values. In this study, we observed resonance-enhanced Raman scattered light from single droplets and colliding droplets by irradiation of pulsed laser light. The resonance enhancement results in the generation of multiorder stimulated Raman scattering (SRS). In order to clarify the mechanism of the generation of the multiorder SRS in the droplet and its further enhancement by the colliding droplet, temporal waveforms of the multiorder SRS was observed. We found that the generation time of the multiorder SRS in the single droplet increases with an increase in the order, which is explained by the sequential generation of the SRS by the previous order SRS light. We also found that the generation time tends to be shorter for colliding droplets than for single droplets. This is due to the very strong light-enhancing effect of the shape of the colliding droplet.

Academic Significance and Societal Importance of the Research Achievements

本研究の目標は,溶液混合反応の初期過程を明らかにすることである。そのため,液滴衝突界面の分光研究法を開発し,精密化した。液滴の衝突部分は,高いQ値を持つ光キャビティとなる。本研究では,衝突液滴界面へのレーザー光照射により生成する高次誘導ラマン散乱光の生成機構を,スペクトルと時間波形の同時観測から調べた。その結果,衝突液滴の形状は,時間波形からも非常に強い光増強効果を示すことが明らかとなった。本研究により,液滴混合反応の全貌を初期過程から明らかにする手法が開発できた。液滴衝突反応は大気エアロゾル,燃料燃焼反応などで重要な役割を果たしており,これらの反応の基礎過程の理解への貢献が期待できる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 2 results) Presentation (5 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results)

  • [Journal Article] Chemical Reactions at the Interface Periphery of Colliding Droplets Studied by Raman Image Analysis2021

    • Author(s)
      Suzuki Shuhei、Kamoshita Aya、Kohno Jun-ya
    • Journal Title

      The Journal of Physical Chemistry A

      Volume: 125 Issue: 41 Pages: 9161-9166

    • DOI

      10.1021/acs.jpca.1c06163

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Cavity enhanced spectroscopy of colliding droplets2020

    • Author(s)
      河野 淳也
    • Journal Title

      Oyo Buturi

      Volume: 89 Issue: 3 Pages: 157-161

    • DOI

      10.11470/oubutsu.89.3_157

    • NAID

      130007806960

    • ISSN
      0369-8009, 2188-2290
    • Year and Date
      2020-03-10
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Low-Frequency Raman Scattering in Colliding Benzene Droplets2019

    • Author(s)
      Negishi Kosuke、Kohno Jun-ya
    • Journal Title

      The Journal of Physical Chemistry A

      Volume: 123 Issue: 42 Pages: 9158-9165

    • DOI

      10.1021/acs.jpca.9b06354

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] ローダミン6G 溶液の衝突液滴から観測される共振増強蛍光スペクトル2022

    • Author(s)
      鴨下 彩,河野 淳也
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Gas-phase solution chemistry2020

    • Author(s)
      河野淳也
    • Organizer
      Aerosol CDT Webinar
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Temporal evolution of multi-order stimulated Raman scattering in droplet2019

    • Author(s)
      Jun-ya Kohno
    • Organizer
      Droplet 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of vibrating pendant-drop Raman spectrometer2019

    • Author(s)
      Tomonao Inoue, Jun-ya Kohno
    • Organizer
      Droplet 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 分光画像観測による液滴衝突反応の高速測定2019

    • Author(s)
      鈴木 崇平,河野 淳也
    • Organizer
      第13回 分子科学討論会 名古屋
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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