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Development of a chemical imaging method of marine particles using optical sensing techniques

Research Project

Project/Area Number 18K13934
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 24020:Marine engineering-related
Research InstitutionJapan Agency for Marine-Earth Science and Technology (2019-2021)
The University of Tokyo (2018)

Principal Investigator

Takahashi Tomoko  国立研究開発法人海洋研究開発機構, 超先鋭研究開発部門(超先鋭技術開発プログラム), Young Research Fellow (20806301)

Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywordsコヒーレント反ストークスラマン散乱 / マイクロプラスチック / 動的粒子化学イメージング / 海中粒子 / 海中粒子測定 / レーザー分光分析 / 深海その場化学センサ開発 / 水中分光学
Outline of Final Research Achievements

In this project, chemical imaging techniques of flowing particles in water were investigated aiming at in-situ continuous monitoring of deep-sea micro particles. For fast in-flow detection of microplastics and microalgae with high spatial and temporal resolutions, a method based on coherent anti-stokes Raman scattering (CARS) detection, was proposed. Different plastic particles with sizes of several tens of micrometers were selectively detected in a high-speed flow. In-flow classification of microplastic and alga particles was also successfully performed by the simultaneous detection of CARS and two-photon excited auto-fluorescence signals. In addition, an integrated method of digital holography and Raman spectroscopy was investigated, and the morphological and chemical analysis of plastic, organic and inorganic particles was demonstrated in a large volume of water using a compact system.

Academic Significance and Societal Importance of the Research Achievements

主たる海中粒子である有機物は深海の貴重な栄養源だが、一方で生態系に影響を及ぼしうるマイクロプラスチックも深海で多く発見されている。現状では海中粒子の種類ごとの分布はサンプリングでしか得ることができず、微小粒子や特に存在密度の少ない深海粒子については限られた情報しかないが、本研究により数十マイクロメートルの微小粒子を流れの中で連続的に化学モニタリングする計測手法を提示でき、深海環境影響評価の革新的なツールとして期待できる。今後手法を海中現場での調査に応用することにより、今までよりはるかに高い空間・時間分解能での調査が可能になり、栄養塩循環への新たな知見やプラスチック汚染のコントロールにつながる。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (10 results)

All 2021 2020 2018 Other

All Int'l Joint Research (4 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Int'l Joint Research] サウサンプトン大学(英国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] サウサンプトン大学(英国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] サウサンプトン大学(英国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] サウサンプトン大学/Insititute for Life Sciences(英国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Selective Imaging of Microplastic and Organic Particles in Flow by Multimodal Coherent Anti-Stokes Raman Scattering and Two-Photon Excited Autofluorescence Analysis2021

    • Author(s)
      Takahashi Tomoko、Herdzik Krzysztof Pawel、Bourdakos Konstantinos Nikolaos、Read James Arthur、Mahajan Sumeet
    • Journal Title

      Analytical Chemistry

      Volume: 93 Issue: 12 Pages: 5234-5240

    • DOI

      10.1021/acs.analchem.0c05474

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Identification of microplastics in a large water volume by integrated holography and Raman spectroscopy2020

    • Author(s)
      Tomoko Takahashi, Zonghua Liu, Thangavel Thevar, Nicholas Burns, Sumeet Mahajan, Dhugal Lindsay John Watson, Blair Thornton
    • Journal Title

      Applied Optics

      Volume: - Issue: 17 Pages: 5073-5073

    • DOI

      10.1364/ao.393643

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] ホログラフィとラマン分光分析を統合した水中マイクロプラスチックのリ アルタイム判別手法の開発2021

    • Author(s)
      髙橋朋子
    • Organizer
      日本地球惑星科学連合2021年大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Identification of microplastics in water by hyphenated-Raman techniques2021

    • Author(s)
      Tomoko Takahashi
    • Organizer
      Pacifichem2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] Development of in-situ LIBS and Raman spectroscopic analyzers for deep-sea surveys2018

    • Author(s)
      Tomoko Takahashi
    • Organizer
      Laser Solutions for Space and the Earth
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Development of in-situ LIBS and Raman spectroscopic analysers for exploration of deep-sea hydrothermal vent fields2018

    • Author(s)
      Tomoko Takahashi
    • Organizer
      SciX 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2023-12-25  

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