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Direct mass spectrometry of organic nanoparticles in air by an enhanced photodesorption/ionization method on nanostructures

Research Project

Project/Area Number 19K05557
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 34030:Green sustainable chemistry and environmental chemistry-related
Research InstitutionHokkaido University

Principal Investigator

Matsuo Yasutaka  北海道大学, 電子科学研究所, 教授 (90374652)

Co-Investigator(Kenkyū-buntansha) 大須賀 潤一  大阪大学, 理学研究科, 特任研究員(常勤) (10817232)
古谷 浩志  大阪大学, 科学機器リノベーション・工作支援センター, 准教授 (40536512)
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: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsソフトイオン化 / プラズモン / MALDI / PM2.5
Outline of Research at the Start

本研究では、大気中ナノ粒子の有機物の“直接”質量分析を行うために必要となる、ナノ粒子を直接捕集し、かつ有機物をフラグメント化させずにレーザー脱離・イオン化(ソフトイオン化)する高効率なイオン化分析チップの開発を行う。具体的には、シリコン三次元ピラー構造表面に数十nmのポーラス構造と、貴金属ナノ粒子に生じる局在表面プラズモンの光アンテナ効果による電場増強を組み合わせた新規なソフトイオン化基板を開発し、大気中ナノ粒子における低分子有機物の高効率質量分析を実現させる。

Outline of Final Research Achievements

We have developed a highly efficient analytical chip for laser desorption/ionization (soft ionization) of atmospheric nano organics, which is necessary for direct mass analysis, without fragmentation of the organics. Specifically, novel soft ionization substrates were developed in which noble metal nanostructures with localized surface plasmons are formed on the surface of a silicon three-dimensional pillar structure, combined with electric field enhancement by optical antenna effect. Some organic materials that does not absorb at the laser light wavelength onto this substrate were absorbed and then laser light is irradiated to this substrate. We confirmed that these organic materials were ionized and that the noble metal nanostructure improved ionization efficiency.

Academic Significance and Societal Importance of the Research Achievements

PM2.5とよばれる大気中浮遊粒子には、数多くの有機ナノ粒子が含まれている。これまではこれらを大量に収集しないと物質の同定が難しい状況であった。今回の研究では、微量な有機物を効率的に分析する手法、特に質量分析という物質として重要となる基本情報を得るための手法に関わる内容である。質量分析にはレーザーを用いたイオン化手法が用いられているが、これまではイオン化を促進するための特殊な有機色素を添加していたが、それらがなくともサンプルを破壊せずに分析を実施できるようになることから、現在進められている質量イメージング技術等にも活用可能な手法になると考えられる。

Report

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

    (5 results)

All 2020

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

  • [Journal Article] Highly Porous Magnesium Silicide Honeycombs Prepared by Magnesium Vapor Annealing of Silica-Coated Polymer Honeycomb Films toward Ultralightweight Thermoelectric Materials2020

    • Author(s)
      Yabu Hiroshi、Matsuo Yasutaka、Yamada Takahiro、Maeda Hirotaka、Matsui Jun
    • Journal Title

      Chemistry of Materials

      Volume: 32 Issue: 23 Pages: 10176-10183

    • DOI

      10.1021/acs.chemmater.0c03696

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Hierarchical growth of Au nanograss with intense built-in hotspots for plasmonic applications2020

    • Author(s)
      Shi Yali、Li Qian、Zhang Yao、Wang Guoqing、Matsuo Yasutaka、Liang Xingguo、Takarada Tohru、Ijiro Kuniharu、Maeda Mizuo
    • Journal Title

      Journal of Materials Chemistry C

      Volume: 8 Issue: 45 Pages: 16073-16082

    • DOI

      10.1039/d0tc04294c

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Site-Selective Wettability Control of Honeycomb Films by UV-O3-Assisted Sol-Gel Coating2020

    • Author(s)
      Yabu Hiroshi、Matsui Jun、Matsuo Yasutaka
    • Journal Title

      Langmuir

      Volume: 36 Issue: 40 Pages: 12023-12029

    • DOI

      10.1021/acs.langmuir.0c02401

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Micro-liquid enclosure array and its semi-automated assembling system for x-ray free-electron laser diffractive imaging of samples in solution2020

    • Author(s)
      Takashi Kimura, Akihiro Suzuki, Ying Yang, Yoshiya Niida, Akiko Nishioka, Masashi Takei, Jinjian Wei, Hideyuki Mitomo, Yasutaka Matsuo, Kenichi Niikura, Kuniharu Ijiro, Kensuke Tono, Makina Yabashi, Tetsuya Ishikawa, Tairo Oshima, Yoshitaka Bessho Yasumasa Joti, and Yoshinori Nishino
    • Journal Title

      Review of Scientific Instruments

      Volume: 91 Issue: 8 Pages: 083706-083706

    • DOI

      10.1063/5.0008398

    • NAID

      120007053062

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Low‐Friction, Superhydrophobic, and Shape‐Memory Vulcanized Rubber Microspiked Structures2020

    • Author(s)
      Uemura Shun、Matsuo Yasutaka、Okamatsu Takahiro、Arita Toshihiko、Shimomura Masatsugu、Hirai Yuji
    • Journal Title

      Advanced Engineering Materials

      Volume: 22 Issue: 4 Pages: 1901226-1901226

    • DOI

      10.1002/adem.201901226

    • Related Report
      2019 Research-status Report
    • Peer Reviewed

URL: 

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

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