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Development of the Millimeter-wave ESR Imaging System Using Near-field Probe

Research Project

Project/Area Number 19K06606
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 43040:Biophysics-related
Research InstitutionInstitute of Physical and Chemical Research

Principal Investigator

Oshima Yugo  国立研究開発法人理化学研究所, 開拓研究本部, 専任研究員 (10375107)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords電子スピン共鳴 / イメージング / 近接場プローブ / 活性酸素種
Outline of Research at the Start

活性酸素種(ROS)は高い反応活性を持ち生体組織やDNAに損傷を与える可能性があり、その有害性が生物学や医学の方面から指摘されている。そこで本研究では、ROSの同定と定量化を得意とする電子スピン共鳴(ESR)のスピントラップ法を用い、生体組織のどの部位からどの活性酸素種(ROS)が発生しているかの可視化を可能にする「ESRイメージング装置」の開発を行う。ミリ波と近接場プローブを組み合わせたESRイメージング装置の開発を行っていく事によって、これまでESRイメージングで問題となってきた、水の誘電損失の問題や空間分解能の問題を解決し、生体試料に適したROSイメージング装置の基礎研究を行う。

Outline of Final Research Achievements

Despite the fact that electron spin resonance (ESR) is a powerful technique for identifying and quantifying reactive oxygen species, ESR is not widely used as a medical/biological imaging technique due to problems such as electromagnetic wave penetration length. We have attempted to develop an ESR imaging technique using near-field and millimeter waves in order to solve the problems of spatial resolution and microwave dielectric loss caused by water, which have been the problems in conventional ESR imaging. In this research project, a prototype of the ESR imaging system was constructed, but in conjunction with millimeter wave power loss and radio interference issues, it was found that the ESR absorption occurs regardless of the sample position. A different approach is needed since a clear ESR image could not be obtained using this method.

Academic Significance and Societal Importance of the Research Achievements

本研究は昨今のESRイメージング研究における問題を解決するべく、新しいアプローチを導入したが、研究期間内で鮮明な画像は得られなかった。ESRイメージングの空間分解能を上げるために近接場を用いるアイデアは妥当であったと考えるが、近接場に利用したチップなどがESR励起用の発振源とESR検出用のプローブを同時に兼ねているところに問題があった。ミリ波ESRイメージングの成功のためには、発振源とESR検出を異なる方法によって切り離す必要があるという事が今回判明した。
一方で、本研究で通常のESR装置の性能が向上したため、物性物理学(特に磁性研究)においていくつかの成果を挙げ、論文発表をしている。

Report

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

    (12 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (4 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (5 results) Remarks (1 results)

  • [Int'l Joint Research] Sungkyunkwan University/Institute for Basic Science(韓国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] Paul Scherrer Insititute(スイス)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Timescale distributions of spin fluctuations in the S=2 kagome antiferromagnet CsMn3F6(SeO3)22022

    • Author(s)
      Lee Suheon、Zhu Tianyu、Oshima Y.、Shiroka T.、Wang C.、Luetkens H.、Yang Haoming、L? Minfeng、Choi K.-Y.
    • Journal Title

      Physical Review B

      Volume: 105 Issue: 9

    • DOI

      10.1103/physrevb.105.094439

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Formation of a Two-Dimensional Electronic System in Laterally Assembled WTe Nanowires2022

    • Author(s)
      Shimizu Hiroshi、Pu Jiang、Liu Zheng、Lim Hong En、Maruyama Mina、Nakanishi Yusuke、Ito Shunichiro、Kikuchi Iori、Endo Takahiko、Yanagi Kazuhiro、Oshima Yugo、Okada Susumu、Takenobu Taishi、Miyata Yasumitsu
    • Journal Title

      ACS Applied Nano Materials

      Volume: - Issue: 5 Pages: 6277-6284

    • DOI

      10.1021/acsanm.2c00377

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electric dipole induced bulk ferromagnetism in dimer Mott molecular compounds2021

    • Author(s)
      Yoshimoto Ryo、Yamashita Satoshi、Akutsu Hiroki、Nakazawa Yasuhiro、Kusamoto Tetsuro、Oshima Yugo、Nakano Takehito、Yamamoto Hiroshi M.、Kato Reizo
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 13321-10

    • DOI

      10.1038/s41598-020-79262-6

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Quantum disordered state in the J1-J2 square-lattice antiferromagnet Sr2Cu(Te0.95W0.05)O62021

    • Author(s)
      Yoon Sungwon、Lee Wonjun、Lee S.、Park J.、Lee C. H.、Choi Y. S.、Do S.-H.、Choi Woo-Jae、Chen Wei-Tin、Chou Fangcheng、Gorbunov D. I.、Oshima Yugo、Ali Anzar、Singh Yogesh、Berlie Adam、Watanabe I.、Choi Kwang-Yong
    • Journal Title

      Physical Review Materials

      Volume: 5 Issue: 1

    • DOI

      10.1103/physrevmaterials.5.014411

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Bilayer型分子強磁性体(Et-4BrT)[Ni(dmit)2]2の非線形伝導2022

    • Author(s)
      大島勇吾,加藤礼三,山本浩史,草本哲郎
    • Organizer
      日本物理学会 第77回年次大会(2022年)
    • Related Report
      2021 Annual Research Report
  • [Presentation] 細胞由来微量活性酸素種のスピン計測法および空間分解能ESR装置の開発2020

    • Author(s)
      大島勇吾,関原早苗,小嶋聡一,加藤礼三
    • Organizer
      電子スピンサイエンス学会(SEST)2020年会
    • Related Report
      2020 Research-status Report
  • [Presentation] π-d電子系λ-(BEST)2FeCl4の電子スピン共鳴2020

    • Author(s)
      大島勇吾、Taehoon Lee、崔亨波、加藤礼三
    • Organizer
      日本物理学会第75回年次大会
    • Related Report
      2019 Research-status Report
  • [Presentation] Development of Spatially-resolved ESR spectrometer and pmol-order ROS detection method2020

    • Author(s)
      大島勇吾、関原早苗、小嶋聡一、加藤礼三
    • Organizer
      理化学研究所・異分野連携発表会(第21回異分野交流の夕べ)
    • Related Report
      2019 Research-status Report
  • [Presentation] π-d電子系λ-(STF)2FeCl4の電子スピン共鳴2019

    • Author(s)
      大島勇吾、Taehoon Lee、南舘孝亮、斎藤洋平、河本充司、松永悟明、加藤礼三
    • Organizer
      日本物理学会2019年秋季大会
    • Related Report
      2019 Research-status Report
  • [Remarks] 加藤分子物性研究室

    • URL

      http://www2.riken.jp/lab/molecule/

    • Related Report
      2021 Annual Research Report 2020 Research-status Report 2019 Research-status Report

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

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