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Observation of viscoelastic phase-separated polymer-stabilized blue phase with super-resolution microscopy

Research Project

Project/Area Number 19H02779
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 35020:Polymer materials-related
Research InstitutionKyushu University

Principal Investigator

Okumura Yasushi  九州大学, 先導物質化学研究所, 准教授 (50448073)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥18,330,000 (Direct Cost: ¥14,100,000、Indirect Cost: ¥4,230,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
Keywords液晶 / 高分子 / 顕微鏡 / 超解像顕微鏡 / 共焦点レーザー走査顕微鏡 / 高分子安定化ブルー相 / スピノーダル分解 / 粘弾性相分離 / Storm / STORM / PSBP
Outline of Research at the Start

高分子安定化ブルー相中の高分子が形成する相分離構造を超解像光学顕微鏡で観察すると共に、その電気光学特性および耐久性との関係を調べることで、ブルー相の安定化で高分子が果たす役割を解明する。さらに、粘弾性相分離による直線的な高分子ネットワークを形成して安定化した「粘弾性相分離型高分子安定化ブルー相」を実現し、長期の耐久性が求められる製品での使用に耐える高分子安定化ブルー相を提供する。

Outline of Final Research Achievements

testBy incorporating spontaneously flickering fluorescent dyes into polymers in polymer-stabilized blue phase (PSBP) and polymer-stabilized chiral nematic phase, we have succeeded in observing polymer structure caused by phase separation with a resolution that exceeds optical resolution, using probabilistic optical reconstruction microscopy, a type of super-resolution microscopy. Using this knowledge, we reduced the polymer concentration in PSBPs, and succeeded in reducing the polymer concentration by about half compared to the conventional method, as well as in drastically reducing the drive voltage. Although we succeeded in observing polymer aggregation structures localized at line defects in the polymer-stabilized chiral nematic phase, we could not observe nanometer-scale polymer aggregation structures localized along line defects in the PSBP.

Translated with www.DeepL.com/Translator (free version)

Academic Significance and Societal Importance of the Research Achievements

超解像顕微鏡はノーベル賞を受賞するほど広く認知された技術であるが、観察対象は生物系試料が大半であり、物性研究に応用された例は少ない。これまでは溶媒を水とする試料で観察されており、疎水的な有機溶媒や液晶を溶媒とする試料の観察は報告されていない。本研究は疎水性液晶にも溶解する蛍光色素のブリンキングを活用して超解像顕微鏡観察を行っており、超解像顕微鏡の活躍の場を広げる点で学術的意義は大きい。材料開発の観点からは、標準的な試料から高分子濃度を半分近くに低減しても低温まで安定な高分子安定化ブルー相を実現し、その駆動電圧は従来よりも29%低減されており、社会の期待に応える材料開発が実現できたと考えている。

Report

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

    (17 results)

All 2022 2021 2020 2019

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (12 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] Enhancement of Polymer Structural Ordering in Polymer-Stabilised Blue Phases for Improved Electro-Optical Properties2021

    • Author(s)
      Hirotsugu Kikuchi, Takahiro Ashimine, Zehui Qin, Hiroki Higuchi, Shizuka Anan, Yasushi Okumura
    • Journal Title

      SYMMETRY-BASEL

      Volume: 13 Issue: 5 Pages: 772-772

    • DOI

      10.3390/sym13050772

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Ultraviolet light screen using cholesteric liquid crystal capsules on the basis of selective reflection2021

    • Author(s)
      Heemuk Oh, Hirotugu Kikuchi, Ji Hyun Lee, Su Ji Kim, Jun Bae Lee, Moon Sun Cho, Min Young Lee, Yasushi Okumura, Joo-Hee Hong, Sung-Kyu Hong
    • Journal Title

      RSC ADVANCES

      Volume: 11 Issue: 41 Pages: 25471-25471

    • DOI

      10.1039/d1ra03499e

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Polymer-Stabilized Blue Phase and Its Application to a 1.5 mu m Band Wavelength Selective Filter2021

    • Author(s)
      Seiji Fukushima, Kakeru Tokunaga, Takuya Morishita, Hiroki Higuchi, Yasushi Okumura, Hirotsugu Kikuchi, Hidehisa Tazawa
    • Journal Title

      CRYSTALS

      Volume: 11 Issue: 9 Pages: 1017-1017

    • DOI

      10.3390/cryst11091017

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] High-Performance Polymer Dispersed Liquid Crystal Enabled by Uniquely Designed Acrylate Monomer2020

    • Author(s)
      Kizhakidathazhath Rijeesh、Nishikawa Hiroya、Okumura Yasushi、Higuchi Hiroki、Kikuchi Hirotsugu
    • Journal Title

      Polymers

      Volume: 12 Issue: 8 Pages: 1625-1625

    • DOI

      10.3390/polym12081625

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Relationship between molecular structures of uniquely designed C2-symmetric axially chiral dopants and their helical twisting properties in cholesteric liquid crystals2019

    • Author(s)
      Yoshizawa Daisuke、Higuchi Hiroki、Okumura Yasushi、Kikuchi Hirotsugu
    • Journal Title

      Journal of Materials Chemistry C

      Volume: 7 Issue: 8 Pages: 2225-2231

    • DOI

      10.1039/c8tc05296d

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Presentation] 共焦点レーザー走査顕微鏡を用いた液晶/高分子複合系の観察2022

    • Author(s)
      奥村泰志
    • Organizer
      022ナノシート研究会春季会議
    • Related Report
      2021 Annual Research Report
  • [Presentation] Observation of Polymer Structure and Electric-field Response of Liquid Crystal Director in Composite Films Consisting of Liquid Crystal and Highly Oriented Polymer2021

    • Author(s)
      Yasushi Okumura
    • Organizer
      19th OLC2021 Okinawa
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 超解像顕微鏡を用いた高分子安定化液晶中の高分子構造の観察2021

    • Author(s)
      本平和也, 奥村泰志, 阿南静佳, 菊池裕嗣
    • Organizer
      2021年日本液晶学会討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 強誘電性ネマチック液晶を母液晶とするブルー相の創製2021

    • Author(s)
      宜保太斗, 奥村泰志, 阿南静佳, 菊池裕嗣
    • Organizer
      2021年日本液晶学会討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 強誘電性ネマチック液晶を母液相とする高分子安定化ブルー相の創製2021

    • Author(s)
      冝保 太斗, 奥村 泰志, 阿南 静佳, 菊池 裕嗣
    • Organizer
      令和3年度九州地区高分子若手研究会・冬の講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 強誘電性ネマチック液晶を用いた誘電エラストマーアクチュエータ2021

    • Author(s)
      城﨑紗也, 奥村泰志, 阿南静佳, 菊池裕嗣
    • Organizer
      2021年日本液晶学会討論会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 共焦点レーザー顕微鏡と液晶2019

    • Author(s)
      奥村 泰志
    • Organizer
      日本液晶学会 全フォーラム合同基礎講座2019「液晶と計測」
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Three-dimensional observation of polymer and liquid crystal director in highly oriented liquid crystal / polymer composite films which show electro-optical transparency-turbidity switching2019

    • Author(s)
      Eiichi Ishida, Yasushi Okumura, Satoshi Niiyama, Hirotsugu Kikuchi
    • Organizer
      Microoptics Conference 2019(MOC2019)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 液晶/高分子複合体中の相分離構造と液晶配向ベクトルの3次元観察2019

    • Author(s)
      有田直矢, 奥村泰志, 菊池裕嗣
    • Organizer
      2019年日本液晶学会討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 分子配向型液晶/高分子複合膜の相分離構造と液晶配向 ベクトル観察2019

    • Author(s)
      石田瑛一, 奥村泰志, 新山 聡, 菊池裕嗣
    • Organizer
      2019年日本液晶学会討論会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 分子配向型液晶/高分子複合膜中の異方的相分離構造の非破壊観察2019

    • Author(s)
      石田瑛一, 奥村泰志, 新山聡, 樋口博紀, 菊池裕嗣
    • Organizer
      第56回化学関連支部合同九州大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 液晶/高分子複合体中の相分離構造と液晶配向ベクトルの観察2019

    • Author(s)
      有田直矢, 奥村泰志, 菊池裕嗣
    • Organizer
      第56回化学関連支部合同九州大会
    • Related Report
      2019 Annual Research Report

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

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