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Study on size-specific phase separation in smectic phases of rod-shaped polymers and its application

Research Project

Project/Area Number 16K04867
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Nanostructural chemistry
Research InstitutionChitose Institute of Science and Technology

Principal Investigator

Okoshi Kento  公立千歳科学技術大学, 理工学部, 教授 (60500139)

Project Period (FY) 2016-10-21 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywords液晶 / スメクチック相 / 枯渇作用 / 配向 / 高圧 / 小角X線散乱 / エントロピー / ナノパターニング / 自己組織化 / 無電解めっき / 高分子構造・物性 / ナノ材料 / 相分離
Outline of Final Research Achievements

The binary mixture of the polysilane, which is a rigid rod-like helical polymer with very narrow molecular weight distribution, and the tetraalkylsilane, which is a spherical molecule, shows the segregation of the tetraalkylsilane between the smectic layers of the polysilane. We revealed that the spherical diameter of the tetraalkylsilane is almost equal to the cylindrical diameter of the polysilane by molecular modeling, and that the high pressure promotes the segregation by X-ray studies, showing that the segregation occurs due to an entropic effect driven by steric repulsion between the rod-like and sphere-like molecules. Furthermore, the layer structure of the segregated smectic phase developed on a Si substrate could be successfully transferred to the substrate by removing the tetraalkylsilane by washing with good solvent followed by a plasma etching using the remained polysilane as a template.

Academic Significance and Societal Importance of the Research Achievements

様々な分野でナノテクノロジーに関する研究が行われているが、従来技術の延長線上にある電子線リソグラフィーでは100nmを超える領域での限界が見え、ナノデバイス開発において実際に今後の技術開発の基盤となるような材料は少ない。これまでのところ自己組織化を利用してブレイクスルーが図られようとしているが、ナノ構造を配向制御できる技術は殆ど存在しない。本研究成果は、配向膜により配向制御可能なスメクチック液晶構造をテンプレートに利用してナノ構造を構築する技術を開発するものであり、その自己組織化のメカニズムを解明し、材料開発指針にエントロピー駆動という新しいモードを付け加えることに成功したものである。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (28 results)

All 2020 2019 2018 2017 2016

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (23 results) (of which Int'l Joint Research: 9 results) Book (1 results)

  • [Journal Article] Dilated Smectic Liquid Crystal of Polystyrene-block-polysilane-block-polystyrene Copolymer Synthesized by Atom Transfer Radical Polymerization2020

    • Author(s)
      Itsuki Kato, Takuya Tanaka, Kento Okoshi
    • Journal Title

      Chemistry Letters

      Volume: 49 Issue: 4 Pages: 347-349

    • DOI

      10.1246/cl.200071

    • NAID

      130007828856

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Smectic-Smectic Phase Segregation Occurring in Binary Mixtures of Long and Short Rigid-Rod Helical Polysilanes2019

    • Author(s)
      Itsuki Kato, Katsuhiko Sunahara, Kento Okoshi
    • Journal Title

      Macromolecules

      Volume: 52 Issue: 3 Pages: 1134-1139

    • DOI

      10.1021/acs.macromol.8b02462

    • Related Report
      2019 Annual Research Report 2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effect of Side Chain Length on Segregation of Squalane between Smectic Layers Formed by Rod-Like Polysilanes2018

    • Author(s)
      Takuya Tanaka, Itsuki Kato, Knto Okoshi
    • Journal Title

      J. Res. Update Polym.

      Volume: 7 Issue: 1 Pages: 1-6

    • DOI

      10.6000/1929-5995.2018.07.01.1

    • Related Report
      2018 Research-status Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Discrimination of photo-induced isomerization and molecular reorientation processes in azobenzene derivative doped in a polymer2018

    • Author(s)
      Kawabe Yutaka、Okoshi Kento
    • Journal Title

      Optical Materials Express

      Volume: 8 Issue: 2 Pages: 332-332

    • DOI

      10.1364/ome.8.000332

    • Related Report
      2018 Research-status Report 2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 棒状高分子の形成するスメクチック相をテンプレートに用いたナノパターニング2020

    • Author(s)
      羽田将人、藤久陸、大越研人
    • Organizer
      54回(2019年度)高分子学会北海道支部冬季研究発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 棒状高分子の形成するスメクチック相をテンプレートに用いたナノパターニング2020

    • Author(s)
      藤久陸、羽田将人、大越研人
    • Organizer
      54回(2019年度)高分子学会北海道支部冬季研究発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 棒状高分子のスメクチック相をテンプレートとして 利用したナノパターニング2019

    • Author(s)
      藤久陸、羽田将人、大越研人
    • Organizer
      高分子学会北海道支部2019年度サマーユニバーシティ&若手会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Smectic-Smectic Phases Segregation Formed in Binary mixtures of Rod-Like Helical Polysilanes with Different Molecular Weights2019

    • Author(s)
      Sandra Piel、藤久陸、大越研人
    • Organizer
      高分子学会北海道支部2019年度サマーユニバーシティ&若手会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Nano-patterning Using Smectic Phase of Rod-Like Polymer as Template2019

    • Author(s)
      Masato Haneda, Riku Fujihisa, Kento Okoshi
    • Organizer
      The 20h Chitose International Forum on Photonics Science & Technology
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 長さの異なる棒状高分子の二成分混合系におけるスメクチック-スメクチック相分離2019

    • Author(s)
      加藤樹、 大越研人
    • Organizer
      第53回高分子学会北海道支部研究発表会
    • Related Report
      2018 Research-status Report
  • [Presentation] Smectic―Smectic Phases Segregation Formed in Binary mixtures of Rod-Like Helical Polysilanes with Different Molecular Weights2018

    • Author(s)
      Itsuki Kato, Kento Okoshi
    • Organizer
      27th International Liquid Crystal Conference (ILCC2018)
    • Related Report
      2018 Research-status Report
  • [Presentation] 棒状らせんポリシランの二成分混合系におけるスメクチックースメクチック相分離2018

    • Author(s)
      大越研人
    • Organizer
      2018年液晶討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] 分子量の異なる棒状高分子の二成分混合系におけるスメクチック-スメクチック相分離2018

    • Author(s)
      加藤樹、 大越研人
    • Organizer
      第67回高分子討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] コイル-ロッド-コイルブロック共重合体が形成するスメクチック相2018

    • Author(s)
      鈴木龍司、加藤樹、 大越研人
    • Organizer
      第67回高分子討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] コイル-ロッド-コイルブロック共重合体が形成するスメクチック相2017

    • Author(s)
      田中汰久冶、大越研人
    • Organizer
      2017年日本液晶学会討論会
    • Related Report
      2017 Research-status Report
  • [Presentation] 分子量の異なる棒状高分子の二成分混合系で発現するスメクチック-スメクチック相分離のSNOM観察2017

    • Author(s)
      砂原克彦、加藤樹、田中汰久冶、大越研人
    • Organizer
      2017年日本液晶学会討論会
    • Related Report
      2017 Research-status Report
  • [Presentation] Induced circular dichroism and laser action of hemicyanine dyes coupled to DNA and DNA-complex2017

    • Author(s)
      Yutaka Kawabe, Yuki Suzuki, Takuya Tanaka, Kento Okoshi
    • Organizer
      SPIE Security + Defence 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spectroscopic studies of hemicyanine dyes coupled to DNA and DNA-complex2017

    • Author(s)
      Yutaka Kawabe, Kento Okoshi
    • Organizer
      CIF18, Chitose International Forum on Photonics Science & Technology
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] A facile synthesis route to decyl-(R)-2-methylbutyl-dichlorosilane as a monomer of rigid-rod helical polysilane2017

    • Author(s)
      Itsuki Kato, Katsuhiko Sunahara, Kento Okoshi
    • Organizer
      CIF18, Chitose International Forum on Photonics Science & Technology
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Smectic liquid crystalline structures of coil-rod-coil block copolymers2017

    • Author(s)
      Takuya Tanaka, Kento Okoshi
    • Organizer
      CIF18, Chitose International Forum on Photonics Science & Technology
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] SNOM observation of smectic-smectic phase segregation formed in binary mixture of rod-like helical polysilanes with different molecular weights2017

    • Author(s)
      Katsuhiko Sunahara, Itsuki Kato, Takuya Tanaka, Kento Okoshi
    • Organizer
      CIF18, Chitose International Forum on Photonics Science & Technology
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 棒状らせん高分子のスメクチック液晶相を用いた枯渇作用による相分離構造2017

    • Author(s)
      田中汰久冶、加藤樹、大越研人
    • Organizer
      51th高分子学会北海道支部研究発表会
    • Place of Presentation
      北海道大学(北海道札幌市)
    • Related Report
      2016 Research-status Report
  • [Presentation] 分子量の異なる棒状高分子の二成分混合系で発現するスメクチック-スメクチック相の相分離2017

    • Author(s)
      砂原克彦、田中汰久冶、加藤樹、大越研人
    • Organizer
      51th高分子学会北海道支部研究発表会
    • Place of Presentation
      北海道大学(北海道札幌市)
    • Related Report
      2016 Research-status Report
  • [Presentation] 太さの異なる棒状高分子の二成分混合系におけるスメクチック相-スメクチック相分離2017

    • Author(s)
      加藤樹、田中汰久冶、大越研人
    • Organizer
      51th高分子学会北海道支部研究発表会
    • Place of Presentation
      北海道大学(北海道札幌市)
    • Related Report
      2016 Research-status Report
  • [Presentation] Smectic―Smectic Phase Separation Formed in Binary mixture of Rod-Like Helical Polysilanes with Different Molecular Weights2016

    • Author(s)
      Katsuhiko Sunahara, Itsuki Kato, Takuya Tanaka, Kento Okoshi
    • Organizer
      17th Chitose International Forum on Photonics Science and Technology (CIF17)
    • Place of Presentation
      千歳科学技術大学(北海道千歳市)
    • Year and Date
      2016-11-14
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Segregation of smectic phases in the binary mixture of rod-like polymers with different diameters2016

    • Author(s)
      Itsuki Kato, Takuya Tanaka, Kento Okoshi
    • Organizer
      17th Chitose International Forum on Photonics Science and Technology (CIF17)
    • Place of Presentation
      千歳科学技術大学(北海道千歳市)
    • Year and Date
      2016-11-14
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] End Modification of Polysilane and SNOM observation of Its Smectic Phase2016

    • Author(s)
      Takuya Tanaka, Miki Yamashita, Kento Okoshi
    • Organizer
      17th Chitose International Forum on Photonics Science and Technology (CIF17)
    • Place of Presentation
      千歳科学技術大学(北海道千歳市)
    • Year and Date
      2016-11-14
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Book] Liquid Crystalline Polymers: Synthesis, Properties and Applications2018

    • Author(s)
      Kento Okoshi
    • Total Pages
      284
    • Publisher
      Central West Publishing
    • Related Report
      2018 Research-status Report

URL: 

Published: 2016-10-24   Modified: 2021-02-19  

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