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Establishment of a molecular self-organization mechanism using localized ions and its applications for photonic functional materials

Research Project

Project/Area Number 18H01851
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 29010:Applied physical properties-related
Research InstitutionHokkaido University

Principal Investigator

Sasaki Yuji  北海道大学, 工学研究院, 助教 (00649741)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
Fiscal Year 2020: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2019: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
Fiscal Year 2018: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Keywords液晶 / 自己組織化 / パターン形成 / 表面改質 / ゲル
Outline of Final Research Achievements

A bottom-up method for micropatterning topological defects in nematic liquid crystals (NLCs) is explored. In this study, we used ultraviolet/ozone treatment in order to align the director field of NLCs on a polysiloxane surface. A micropattern formation of topological defects was observed for various types of NLCs. The effect of the accumulated ions contained in NLCs was examined. Particularly, by applying area-selective surface modification, it is found that the uniform micropattern can be observed over a large area. The idea enabled to generate different types of patterns, which could be useful for further optical studies.

Academic Significance and Societal Importance of the Research Achievements

液晶材料において分子配向を制御することは、応用面から常に重要である。従来の液晶デバイスでは、分子配向の欠陥は不必要なものとされてきた。それに対し、近年になり、欠陥構造に由来する光学特性を利用した素子が実用化されはじめ、分子配向欠陥を制御する方法の確立が必要とされている。本研究では、分子配向欠陥を規則正しくミクロなスケールで配列させるボトムアップ型の手法を確立した。欠陥を使った光学実験を実験室レベルで容易に実施できるようになると期待される。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (12 results)

All 2021 2019 2018 Other

All Int'l Joint Research (1 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (8 results) (of which Int'l Joint Research: 2 results)

  • [Int'l Joint Research] ハンガリー科学アカデミー・ウィグナー物理学研究センター(ハンガリー)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] A general control strategy to micropattern topological defects in nematic liquid crystals using ionically charged dielectric surface2021

    • Author(s)
      Y. Sasaki, J. Takahashi, S. Yokokawa, T. Kikkawa, R. Mikami, H. Orihara
    • Journal Title

      Advanced Materials Intefaces

      Volume: - Issue: 11

    • DOI

      10.1002/admi.202100379

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tunable two-dimensional polarization grating using a self-organized micropixelated liquid crystal structure2018

    • Author(s)
      Amano Reo、Salamon Peter、Yokokawa Shunsuke、Kobayashi Fumiaki、Sasaki Yuji、Fujii Shuji、Buka Agnes、Araoka Fumito、Orihara Hiroshi
    • Journal Title

      RSC Advances

      Volume: 8 Issue: 72 Pages: 41472-41479

    • DOI

      10.1039/c8ra08557a

    • NAID

      120006551601

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Tunable Optical Vortices Generated by Self-Assembled Defect Structures in Nematics2018

    • Author(s)
      Salamon Peter、Eber Nandor、Sasaki Yuji、Orihara Hiroshi、Buka Agnes、Araoka Fumito
    • Journal Title

      Physical Review Applied

      Volume: 10 Issue: 4

    • DOI

      10.1103/physrevapplied.10.044008

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 液晶パターン形成における閾値電圧の インピーダンス測定による評価2021

    • Author(s)
      佐々木裕司, 吉川拓穂, 長川純也, 折原宏
    • Organizer
      日本物理学会 第76回年次大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 液晶トポロジカル欠陥のパターン形成と表面改質の効果2019

    • Author(s)
      佐々木 裕司、横川 俊輔、高橋 淳之介、吉川 拓穂、藤井 修治、折原 宏
    • Organizer
      日本液晶学会討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 光重合性液晶材料を用いたトポロジカル欠陥配列の形成2019

    • Author(s)
      吉川 拓穂、佐々木 裕司、藤井 修治、折原 宏
    • Organizer
      日本液晶学会討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 表面改質を利用した液晶トポロジカル欠陥配列の作成2019

    • Author(s)
      佐々木 裕司、横川 俊輔、高橋 淳之介、吉川 拓穂、藤井 修治、折原 宏
    • Organizer
      日本物理学会秋季大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Polymer-stabilization of a micro-pixelated liquid crystal structure2018

    • Author(s)
      Yuji Sasaki, Motoshi Ueda, Khoa V. Le, Reo Amano, Shin Sakane, Shuji Fujii, Fumito Araoka, Hiroshi Orihara
    • Organizer
      27th International Liquid Crystal Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of Chirality on Self-Organized Topological Defects Arrays2018

    • Author(s)
      Shunsuke Yokokawa, Junnosuke Takahashi, Yuji Sasaki, Shuji Fujii, Fumito Araoka, Hiroshi Orihara
    • Organizer
      27th International Liquid Crystal Conference
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 液晶トポロジカル欠陥配列の光回折特性2018

    • Author(s)
      横川 俊輔、天野 怜央、小林 史明、佐々木 裕司、藤井 修治、荒岡 史人、折原 宏
    • Organizer
      日本液晶学会討論会
    • Related Report
      2018 Annual Research Report
  • [Presentation] トポロジカル欠陥配列に対するキラリティの効果2018

    • Author(s)
      高橋 淳之介、横川 俊輔、佐々木 裕司 、荒岡 史人、藤井 修治、折原 宏
    • Organizer
      日本液晶学会討論会
    • Related Report
      2018 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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