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Exploration for new single-molecule electret and elucidation of its structural property

Research Project

Project/Area Number 19H02799
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 36010:Inorganic compounds and inorganic materials chemistry-related
Research InstitutionHiroshima University

Principal Investigator

Nishihara Sadafumi  広島大学, 先進理工系科学研究科(理), 教授 (00405341)

Co-Investigator(Kenkyū-buntansha) 戸川 欣彦  大阪府立大学, 工学(系)研究科(研究院), 教授 (00415241)
帯刀 陽子  東京農工大学, 工学(系)研究科(研究院), 講師 (30435763)
久保田 佳基  大阪府立大学, 理学(系)研究科(研究院), 教授 (50254371)
石橋 広記  大阪府立大学, 理学(系)研究科(研究院), 准教授 (70285310)
綱島 亮  山口大学, 大学院創成科学研究科, 准教授 (70466431)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2021: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2020: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
Keywords単分子誘電体 / 単分子 / 強誘電 / メモリ / 自発分極 / ヒステリシス
Outline of Research at the Start

我々はこれまでに,単一分子で強誘電的な物性を示す「単分子誘電体」の存在を実証し,学術的・産業的に多くの注目を集めた。しかし,物性発現の根幹である「構造」と「分極」の相関が完全に解明されておらず,解決するべき学術的「問い」として残されている。この課題を解決する為,本研究では,様々なアプローチから「単分子誘電物性」の構造学的解明を図る。更に,この結果を分子設計指針に取り入れ,新たな物質群の開拓を目指す。

Outline of Final Research Achievements

We have succeeded in developing “single-molecule electret” that exhibits electric hysteresis and spontaneous polarization characteristic of ferroelectrics in a single molecule. However, since the correlation between its “structure” and “polarization”, which is the origin of properties of single-molecule electret, has not been completely clarified, we have not been able to establish a guideline for molecular design that leads to the development of new material groups of the single-molecule electrets. Therefore, in this study, we aimed to understand properties of single-molecule electret from a structural viewpoint and to develop new material groups based on the results. As a result, we have newly discovered 23 single-molecule electrets.

Academic Significance and Societal Importance of the Research Achievements

一般的に強誘電体は結晶内の分極が長距離に渡って配向し,それが電場によって反転する物性を指す。従って,強誘電性は結晶構造由来のバルクの物性と考えられてきた。しかし,我々が開発した「単分子誘電体」は,一分子で強誘電体に特徴的な分極ヒステリシスや自発分極を示す新しい物質群と位置付けられる。例えばこの物質をメモリ材料として用いた場合,単一分子メモリに繋がることが期待され,これが実現した場合,従来の記録密度限界の1000倍以上の記録密度をもつと理論的に見積もられている。従って,当該物質の基礎的な学理構築は学術的な意義に留まらず,産業的にも重要である。

Report

(2 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • Research Products

    (15 results)

All 2022 2021 Other

All Int'l Joint Research (3 results) Journal Article (5 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 5 results,  Open Access: 1 results) Presentation (4 results) (of which Invited: 4 results) Patent(Industrial Property Rights) (3 results) (of which Overseas: 1 results)

  • [Int'l Joint Research] The University of Glasgow/The University of Edinburgh(英国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] 東南大学/南京工業大学(中国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University of Delhi(インド)

    • Related Report
      2021 Annual Research Report
  • [Journal Article] Ferroelastic-like transition and solvents affect the magnetism of a copper-organic radical one-dimensional coordination polymer2022

    • Author(s)
      Gao Yan-Li、Nishihara Sadafumi、Suzuki Takashi、Umeo Kazunori、Inoue Katsuya、Kurmoo Mohamedally
    • Journal Title

      Dalton Transactions

      Volume: 51 Issue: 17 Pages: 6682-6686

    • DOI

      10.1039/d2dt00135g

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Fluorescent properties of a cage-shaped molecule composed of tetrakis[4-(4-pyridylphenyl)]ethylene moieties2022

    • Author(s)
      Kobukai Chisato、Tadai Momo、Nishimura Tamaki、Hattori Kohei、Nishihara Sadafumi、Okada Shuji、Tatewaki Yoko
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 61 Issue: SE Pages: SE1004-SE1004

    • DOI

      10.35848/1347-4065/ac5531

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A tetrameric praseodymium substituted arsenotungstate (III)- Synthesis & characterization, electrochemistry, catalytic and its magnetic applications2022

    • Author(s)
      Kaushik Reetam、Khan Imran、Das Vivek、Hussain Firasat、Manabe Jun、Nishihara Sadafumi、Teillout Anne-Lucie、Mbomekall Isral-Martyr、de Oliveira Pedro
    • Journal Title

      Polyhedron

      Volume: 216 Pages: 115698-115698

    • DOI

      10.1016/j.poly.2022.115698

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Structural phase transition in cobalt oxyfluoride Co3Sb4O6F6 observed by high-resolution synchrotron and neutron diffraction2021

    • Author(s)
      S. Shimono, H. Ishibashi, Y. Nagayoshi, H. Ikeno, S. Kawaguchi, M. Hagihala, S. Torii, T. Kamiyama, K. Ichihashi, S. Nishihara, K. Inoue, Y. Ishii, Y. Kubota
    • Journal Title

      Journal of Physics and Chemistry of Solids

      Volume: 163 Pages: 110568-110568

    • DOI

      10.1016/j.jpcs.2021.110568

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Single‐Molecule Magnetic, Catalytic and Photoluminescence Properties of Heterometallic 3d4f [Ln{PZn2W10O38(H2O)2}2]11- Tungstophosphate Nanoclusters2021

    • Author(s)
      Das Vivek、Khan Imran、Hussain Firasat、Sadakane Masahiro、Tsunoji Nao、Ichihashi Katsuya、Kato Chisato、Inoue Katsuya、Nishihara Sadafumi
    • Journal Title

      European Journal of Inorganic Chemistry

      Volume: 2021 Issue: 37 Pages: 3819-3831

    • DOI

      10.1002/ejic.202100528

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 単一分子で強誘電体のように振る舞う「単分子誘電体」の開発2021

    • Author(s)
      西原禎文
    • Organizer
      新化学技術推進協会(JACI) 電子情報技術部会ナノフォトニクスエレクトロニクス交流会講演会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 単一分子で強誘電体の様な挙動を示す「単分子誘電体」の開発2021

    • Author(s)
      西原禎文
    • Organizer
      東京大学 物性研究所 短期研究会「分子性固体研究の拡がり:新物質と新現象」
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 室温で駆動する単分子不揮発性メモリの開発2021

    • Author(s)
      西原禎文
    • Organizer
      タングステン・モリブデン工業会(JTMIA)第33回タンモリ工業会セミナー
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 室温で駆動する単分子不揮発性メモリの開発2021

    • Author(s)
      西原禎文
    • Organizer
      第71回中国四国産学連携化学フォーラム
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Patent(Industrial Property Rights)] 圧電材料及び圧電素子2022

    • Inventor(s)
      西原禎文、藤林将
    • Industrial Property Rights Holder
      西原禎文、藤林将
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Related Report
      2021 Annual Research Report
  • [Patent(Industrial Property Rights)] クラウンエーテルの供給及び回収方法並びにイオン伝導性結晶2022

    • Inventor(s)
      西原禎文、伊藤みづき、眞邉潤、藤林将
    • Industrial Property Rights Holder
      西原禎文、伊藤みづき、眞邉潤、藤林将
    • Industrial Property Rights Type
      特許
    • Filing Date
      2022
    • Related Report
      2021 Annual Research Report
  • [Patent(Industrial Property Rights)] 単分子誘電体膜および単分子誘電体膜の製造方法2021

    • Inventor(s)
      西原禎文、藤林将、井上克也、定金正洋
    • Industrial Property Rights Holder
      西原禎文、藤林将、井上克也、定金正洋
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2021 Annual Research Report
    • Overseas

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Published: 2019-04-18   Modified: 2025-12-26  

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