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Fabrication of a hybrid of polysilane-ferromagnetic metal for normally-off computing

Research Project

Project/Area Number 19K05638
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 35030:Organic functional materials-related
Research InstitutionNara National College of Technology

Principal Investigator

Matsuura Yukihito  奈良工業高等専門学校, 物質化学工学科, 教授 (00416322)

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: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsポリシラン / メタクリル / 共重合体 / スピン伝導 / 非平衡グリーン関数法 / ランダウアモデル / メタクリレート / 光重合 / メタクリルモノマー / 光化学反応 / 強磁性金属 / ハイブリッド / トンネル磁気抵抗 / 量子化学計算
Outline of Research at the Start

本計画は、電力不要で記録を保持できるノーマリーオフコンピューティングシステム構築の鍵となる電子材料に関する研究である。その材料としては、直鎖状にケイ素原子が連結して形成されたポリシランに対して、我々が独自に開発した光重合法を用いて両末端を官能基で修飾する。このポリマーを強磁性電極間にサンドイッチ状に配置したハイブリッドを形成する。さらに、磁場により電流値がコントロールされるトンネル磁気抵抗(TMR)効果を計測する。ポリシランはTMR素子に適した性質を持つことを既に申請者が量子化学計算で予測しているので、本研究ではそれらを合成して電気伝導を測定し、電気伝導のメカニズムを解明する。

Outline of Final Research Achievements

In this work, I have studied the synthesis of copolymers having polysilane and metahcryl blocks. It has been already known that pi-cojugated molecules have a high tunnel magnetoresistance of several ten percent by using experimental measurments. Polysilane has a sigma-conjugation extending along the Si-Si main chain by the Si 3p electrons. In this plan, I have prepared polysilane-metahryl block copolymers, which can be applied to construct a tunnel magnetoresistance device. The synthetic method was photopolymerization of methacryl monomer using the polysilane as a photo radical initiator to leave the polysilane block for constructing the block copolymers. Furthermore, I have calculated the spin conduction in the polysilane-block copolymers and other related peptide structures to confirm the molecular structure for increasing the TMR ratios.

Academic Significance and Societal Importance of the Research Achievements

本研究を遂行してポリシラン‐メタクリルブロック共重合体の化学構造を厳密に制御することが可能になり、ポリシランのトンネル磁気抵抗素子への応用の可能性をさらに高めることに成功した。また、量子化学計算により、らせん構造を持つ分子が高いスピン分極を誘起することが明らかになった。これを応用するために、メルカプト基をもつ有機分子とのエン‐チオール反応により、この有機分子とポリシランの間にS-C結合を形成して、ポリシラン‐有機分子のハイブリッド薄膜を形成することに成功した。タンパク質の中にはチオール基があることから、この共重合体はタンパク質との結合を形成するのに応用できることが明らかになった。

Report

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

    (15 results)

All 2022 2021 2020 2019

All Journal Article (9 results) (of which Peer Reviewed: 8 results) Presentation (6 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Coherent spin transport in a multi-heme protein molecule2022

    • Author(s)
      Y. Matsuura
    • Journal Title

      Chem. Phys.

      Volume: 558 Pages: 111510-111510

    • DOI

      10.1016/j.chemphys.2022.111510

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Preparation and Applications of a Polysilane-allyl Methacrylate Copolymer2021

    • Author(s)
      F. Kato, Y. Matsuura, M. Ohikita, T. Tachikawa
    • Journal Title

      Journal of Photopolymer Science and Technology

      Volume: 34 Issue: 3 Pages: 255-258

    • DOI

      10.2494/photopolymer.34.255

    • NAID

      130008119609

    • ISSN
      0914-9244, 1349-6336
    • Year and Date
      2021-06-11
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Coherent spin transport in a natural metalloprotein molecule2021

    • Author(s)
      Y. Matsuura
    • Journal Title

      J. Appl. Phys.

      Volume: 130 Issue: 18

    • DOI

      10.1063/5.0069552

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tunnel magnetoresistance of a natural protein molecule2021

    • Author(s)
      Y. Matsuura
    • Journal Title

      Chem. Phys. Lett.

      Volume: 777 Pages: 138741-138741

    • DOI

      10.1016/j.cplett.2021.138741

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Structure-dependent spin transport in a DNA molecule2020

    • Author(s)
      Y. Matsuura, F. Kato
    • Journal Title

      Compt. Theor. Chem.

      Volume: 1188 Pages: 112943-112943

    • DOI

      10.1016/j.comptc.2020.112943

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Spin transport in a DNA molecule modified by cytosine methylation2020

    • Author(s)
      Y. Matsuura, F. Kato
    • Journal Title

      Chem. Phys

      Volume: 539 Pages: 110946-110946

    • DOI

      10.1016/j.chemphys.2020.110946

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Coherent spin transport in a DNA molecule2020

    • Author(s)
      Yukihito Matsuura
    • Journal Title

      Chemical Physics

      Volume: 528 Pages: 110537-110537

    • DOI

      10.1016/j.chemphys.2019.110537

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Single-molecule tunnel magnetoresistance of azulene2019

    • Author(s)
      Yukihito Matsuura
    • Journal Title

      Physica E

      Volume: 105 Pages: 219-233

    • DOI

      10.1016/j.physe.2018.09.022

    • Related Report
      2019 Research-status Report
  • [Journal Article] Single-molecule tunnel magnetoresistance of p-type doped polypyrrole2019

    • Author(s)
      Yukihito Matsuura, Iseki Taniguchi
    • Journal Title

      Organic Electronics

      Volume: 69 Pages: 114-119

    • DOI

      10.1016/j.orgel.2019.03.028

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Preparation and applications of a polysilane-allyl methacrylate copolymer2021

    • Author(s)
      F. Kato, Y. Matsuura, M. Ohikita, T. Tachikawa
    • Organizer
      The 38th International Conference of Photopolymer Science and Technology
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Spin transport in a DNA molecule2021

    • Author(s)
      Y. Matsuura
    • Organizer
      17th International conference on Advanced Nanomaterials
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 天然タンパク質分子の電気伝導およびスピン分極に関する理論的研究2021

    • Author(s)
      中辻賢人、松浦幸仁、大北正信、立川友晴
    • Organizer
      第31回バイオ・高分子シンポジウム
    • Related Report
      2021 Annual Research Report
  • [Presentation] メチル化シトシンをもつDNA分子におけるスピン伝導の理論的研究2021

    • Author(s)
      中辻賢人、松浦幸仁
    • Organizer
      第70回高分子討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] メタクリル酸アリルとポリシランとの共重合体の合成2020

    • Author(s)
      加藤史也、松浦幸仁、大北正信、立川友晴
    • Organizer
      第69回高分子討論会(2020年)(オンライン)
    • Related Report
      2020 Research-status Report
  • [Presentation] Spin transport in a homo-catenated molecular chain of group 14 elements2019

    • Author(s)
      Yukihito Matsuura
    • Organizer
      3rd International Conference On Applied Surface Science, Italy, Pisa
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited

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

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