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Developing an elucidation method for surface chemistry on subnanoscaled holes of functional thin films by positronium annihilation

Research Project

Project/Area Number 16H04526
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Structural/Functional materials
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

ITO KENJI  国立研究開発法人産業技術総合研究所, 計量標準総合センター, 研究グループ長 (90371020)

Research Collaborator OSHIMA NAGAYASU  
HAGIHARA HIDEAKI  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥15,470,000 (Direct Cost: ¥11,900,000、Indirect Cost: ¥3,570,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2016: ¥11,050,000 (Direct Cost: ¥8,500,000、Indirect Cost: ¥2,550,000)
Keywords陽電子消滅 / 分子間空隙 / 機能性薄膜 / ポジトロニウム / 陽電子寿命運動量相関法 / 低エネルギー陽電子ビーム / 寿命・運動量相関測定法 / 陽電子ビーム / 多孔質薄膜 / 細孔構造 / 自由体積 / 機能性高分子材料 / 機能性高分子 / 寿命・運動量相関 / 低速陽電子ビーム / 高分子構造・物性 / 量子ビーム
Outline of Final Research Achievements

In this work, a highly-stable positron-age momentum correlation measurement system with a Na-22-radioisotope-base pulsed, low-energy positron beam, applicable to thin materials, were developed based on the positron annihilation technique that is a method for experimentally characterizing intermolecular holes in the amorphous region of the materials. By testing reference thin films systematically, a relationship between the momentum distributions due to long-lived positronium annihilations and the chemical composition of the material was elucidated. A technique to evaluate the sizes of the intermolecular holes as well as the surface chemistry on the holes was developed for functional thin materials.

Academic Significance and Societal Importance of the Research Achievements

低環境負荷な革新的材料の創製をめざし,特性発現の起源となるサブナノスケール構造が制御された物質の研究開発が進んでいる.高選択性センサー,燃料電池の電解質や分子分離膜に利用される薄膜部材に求められる特性を操るために分子・原子レベルのナノ空隙の重要性が解明され,機能性薄膜のナノ空隙をそのままの姿で見られる解析技術が必要不可欠となっている.本研究成果によりナノ空隙の大きさと化学状態を評価できることから,機能性薄膜材料の微視構造設計の新たな指針を構築することができ, 高度に分子設計された革新的膜材料の研究開発にブレイクスルーをもたらすと期待できる.

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (13 results)

All 2018 2017 2016

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (12 results) (of which Int'l Joint Research: 7 results,  Invited: 4 results)

  • [Journal Article] Preliminary results on low-energy positron age-momentum correlation measurements based on a radioisotope-source positron beam2018

    • Author(s)
      Ito Kenji
    • Journal Title

      JJAP Conference Proceedings

      Volume: 7 Pages: 011302-011302

    • DOI

      10.7567/jjapcp.7.011302

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Nanoporosity and surface chemistry of siloxane-silica thin films elucidated by low-energy PALS and AMOC2018

    • Author(s)
      伊藤 賢志
    • Organizer
      18th International Conference on Positron Annihilation
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Slow positron beam and related research at AIST -Recent developments and future plans-2018

    • Author(s)
      オローク ブライアン、伊藤 賢志、小林 慶規、満汐 孝治、大平 俊行、大島 永康、鈴木 良一、山脇 正人
    • Organizer
      18th International Conference on Positron Annihilation
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Evaluation of subnanoscale pore structure of silica PECVD films time-elapsed under the atmospheric conditions2018

    • Author(s)
      吉本 茂、伊藤 賢志、細見 博之、竹田 正明、都留 稔了
    • Organizer
      18th International Conference on Positron Annihilation
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Free-volume study of radiation-irradiated polymers by means of the 22Na-based low-energy AMOC technique2018

    • Author(s)
      土田 秀次、岡 壽崇、大島 永康、オローク ブライアン、伊藤 賢志
    • Organizer
      18th International Conference on Positron Annihilation
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 低速AMOC測定による有機シリカCVD膜の細孔構造2018

    • Author(s)
      伊藤 賢志
    • Organizer
      第61回 放射線化学討論会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 低速陽電子ビームによるシリカプラズマ重合膜のサブナノ細孔解析2018

    • Author(s)
      吉本 茂、伊藤 賢志、熊谷 和博、細見 博之、竹田 正明、都留 稔了
    • Organizer
      第56回アイソトープ・放射線研究発表会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 低速AMOCによる有機シリカ薄膜のナノ空孔化学構造2018

    • Author(s)
      伊藤 賢志
    • Organizer
      京都大学複合原子力科学研究所専門研究会 「陽電子科学とその理工学への応用」
    • Related Report
      2018 Annual Research Report
  • [Presentation] Nanopore structure of siloxane-silica CVD films elucidated by the low-energy AMOC technique with a radioisotope-based pulsed positron beam2017

    • Author(s)
      Kenji Ito
    • Organizer
      12th International Workshop on Positron and Positronium Chemistry
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Preliminary results on low-energy AMOC based on a RI beam2017

    • Author(s)
      Kenji Ito
    • Organizer
      3rd China-Japan Joint Workshop on Positron Science
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] RIベース低速パルス化陽電子による陽電子寿命運動量相関測定2017

    • Author(s)
      伊藤 賢志
    • Organizer
      第60回放射線化学討論会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Na-22ベース低速AMOCシステム構築と高分子薄膜への応用2017

    • Author(s)
      伊藤 賢志
    • Organizer
      京都大学原子炉実験所専門研究会 「陽電子科学とその理工学への応用」
    • Related Report
      2017 Annual Research Report
  • [Presentation] Free volume of separation membranes as studied by positron annihilation techniques2016

    • Author(s)
      Kenji Ito
    • Organizer
      14th International Workshop on Slow Positron Beam Techniques & Applications
    • Place of Presentation
      松江市くにびきメッセ
    • Year and Date
      2016-05-25
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2016-04-21   Modified: 2020-03-30  

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