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Liquid crystal microspheres with high tunability of selective reflection properties by light and electric-field

Research Project

Project/Area Number 19K05624
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 InstitutionUtsunomiya University (2022)
Hokkaido University (2019-2021)

Principal Investigator

Kim Yuna  宇都宮大学, 工学部, 助教 (00648131)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Keywords液晶 / マイクロ球体 / 光異性化 / エレクトロクロミズム / デバイス / π共役系ポリマー
Outline of Research at the Start

本申請研究では、選択反射の色と強度を光照射と電圧印加により瞬時かつ自在にコントロールできるtriple-emulsion構造を有する複合マイクロ球体を創製する。光照射により選択反射色を大きく変化させるCLC(コア部)、ECポリマー(シェル部)及び親水性インナーシェルをマイクロ流体デバイスを用いて導入し、幅広い光応答性、及び電気活性を持つ複合球体を網羅的に開発する。良好な特性を示す複合球体の作製方法を確立したのち、マイクロ球体材料を用いた新たな基盤技術として、光照射や電場印加の組み合わせにより全方位にわたってその選択反射色と強度を迅速に制御できるかを検討する。

Outline of Final Research Achievements

Cholesteric liquid crystals (CLC) incorporating sugar-containing macrocyclic azobenzene derivatives as photoresponsive chiral additives exhibited optical modulation properties of helical pitch length up to 500%. Microspheres with CLC in the core or polythiophene derivatives in the shell were fabricated using a microfluidic device. The spheres showed reversible control of reflected lights (blue-green ⇔ yellow ⇔ red) by irradiation with ultraviolet and visible light, and the rapid response property of coloring and bleaching in 2~3 seconds was obtained when an electric field was applied to the device. On the other hand, by introducing a complex of an ionic liquid and a luminescent europium complex into a electrochemical switching device, controlling the redox reaction of the complex with an electric field enabled the switching of the red emission intensity.

Academic Significance and Societal Importance of the Research Achievements

本研究で開発した複合マイクロ球体材料やデバイスは、全方位にわたる選択反射光の波長・強度や吸収度を、光と電場により多段階で制御できるため、全方位反射型ディスプレイ、レーザー共振器等の開発につながると確信している。また、透明なイオン液体複合体をCLC球体デバイスに導入することで、今後光・電場に応答する反射光・発光の多重スイッチングを可能とする光学デバイス分野へ大きな波及効果を与えると期待できる。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (39 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (8 results) Journal Article (9 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 9 results) Presentation (19 results) (of which Int'l Joint Research: 7 results,  Invited: 4 results) Remarks (2 results) Patent(Industrial Property Rights) (1 results)

  • [Int'l Joint Research] KAIST(韓国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] ENS Paris-Saclay(フランス)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] ENS Paris-Saclay(フランス)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] KAIST(韓国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] ENS Paris-Saclay(フランス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] KAIST(韓国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] ENS Paris-Saclay(フランス)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] KAIST(韓国)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Unique Thermal Structural Phase Transitions Exhibited by Unsymmetrical Organometallic Gold(III)‐Dithiolene Complexes with Pentylthio and Hexylthio Groups2023

    • Author(s)
      Arata Sonomi、Kim Yuna、Hoshino Norihisa、Tahara Keishiro、Takahashi Kiyonori、Kadoya Tomofumi、Inoue Tomonori、Nakamura Takayoshi、Akutagawa Tomoyuki、Yamada Jun‐ichi、Kubo Kazuya
    • Journal Title

      European Journal of Inorganic Chemistry

      Volume: 26 Issue: 12

    • DOI

      10.1002/ejic.202300017

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] s-Tetrazine derivative exhibiting unprecedented polymorphism-dependent emission properties2023

    • Author(s)
      Kim Yuna、Allain Clemence、Guillot Regis、Audebert Pierre
    • Journal Title

      Journal of Photochemistry and Photobiology A: Chemistry

      Volume: 439 Pages: 114629-114629

    • DOI

      10.1016/j.jphotochem.2023.114629

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Transition metal complexes for electrochromic and electrofluorochromic devices2023

    • Author(s)
      Kim Yuna、Kubo Kazuya
    • Journal Title

      Pure and Applied Chemistry

      Volume: -

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Specular Acoustic Vibrational Wave Transmissions with the Presence of Phononic Bandgaps2022

    • Author(s)
      Cho Hai Jun、Wu Yuzhang、Qi Jiajun、Kim Yuna、Ohta Hiromichi、Matsuda Osamu
    • Journal Title

      Journal of the Physical Society of Japan

      Volume: 91 Issue: 1 Pages: 014601-014601

    • DOI

      10.7566/jpsj.91.014601

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Pressure-tunable thermal conductivity observed for bisamide functionalized diacetylene crystals2021

    • Author(s)
      Qi Jiajun、Wu Yuzhang、Cho Hai Jun、Kim Yuna、Ohta Hiromichi、Tamaoki Nobuyuki
    • Journal Title

      Journal of Materials Science

      Volume: 56 Issue: 27 Pages: 15481-15490

    • DOI

      10.1007/s10853-021-06192-7

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Unique Solvatochromic Behavior of Unsymmetrical Platinum‐Dithiolene Complexes Coordinated by 4,4’‐Dinonyl‐2,2’‐Bipyridine2021

    • Author(s)
      Hori Aoi、Kim Yuna、Tahara Keishiro、Kadoya Tomofumi、Yamada Jun‐ichi、Kubo Kazuya
    • Journal Title

      European Journal of Inorganic Chemistry

      Volume: 2021 Issue: 11 Pages: 1023-1027

    • DOI

      10.1002/ejic.202001014

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Glycomacrocycle-Based Azobenzene Derivatives as Chiral Dopants for Photoresponsive Cholesteric Liquid Crystals2020

    • Author(s)
      Kim Yuna、Mafy Noushaba Nusrat、Maisonneuve Stephane、Lin Chaoqi、Tamaoki Nobuyuki、Xie Juan
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 12 Issue: 46 Pages: 52146-52155

    • DOI

      10.1021/acsami.0c14880

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Electrofluorochromic Device Based on a Redox-Active Europium(III) Complex2020

    • Author(s)
      Kim Yuna、Ohmagari Hitomi、Saso Akira、Tamaoki Nobuyuki、Hasegawa Miki
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 12 Issue: 41 Pages: 46390-46396

    • DOI

      10.1021/acsami.0c13765

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Molecular Crankshaft Effect Converting Piston-like Molecular Motion to Continuous Rotation of Macro Objects2019

    • Author(s)
      Mafy Noushaba Nusrat、Kim Yuna、Thomas Reji、Akasaka Takehito、Tamaoki Nobuyuki
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 11 Issue: 16 Pages: 15097-15102

    • DOI

      10.1021/acsami.9b03706

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Unprecedented crystalline-phase-dependent emission properties observed from an s-tetrazine derivative2023

    • Author(s)
      Yuna Kim, Clemence Allain, Regis Guillot, Pierre Audebert
    • Organizer
      日本化学会 第103春季年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Fabrication of perovskite/carbonaceous nanocomposite and its evaluation toward electrochemical detection of amino acids2023

    • Author(s)
      Jeevika Alagan, Ryosuke Yambe, Yuna Kim, Ken-ichi Iimura
    • Organizer
      日本化学会 第103春季年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Photoresponsive cholesteric liquid crystals based on macrocyclic azobenzene derivatives containing sugar2022

    • Author(s)
      YUNA KIM, Runze Lin, Stephane Maisonneuve, Chaoqi Lin, Nobuyuki Tamaoki, Juan Xie
    • Organizer
      第73回コロイドおよび界面化学討論会・国際シンポジウム
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] チオール検出を指向した テトラジン型超分子センサの開発2022

    • Author(s)
      吉川 未祐・池内 勝哉・下別府 巽・キム ユナ・和泉 雅之・越智 里香
    • Organizer
      2022年日本化学会中国四国支部大会 広島大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 分子ドナー/アクセプター配位子からなる非対称型金(Ⅲ)錯体が示す 熱的構造相転移2022

    • Author(s)
      荒田 園巳,キム ユナ,星野 哲久,角屋 智史,芥川 智行, 山田 順一,久保 和也
    • Organizer
      第16回分子科学討論会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 外部刺激に対して光学及び機械的機能を示す動的分子材料の開発2022

    • Author(s)
      キム ユナ
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 2021年度女性化学者奨励賞受賞者の紹介2022

    • Author(s)
      キム ユナ
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] アルキルチオ基を導入した非対称型金(Ⅲ)ジチオレン錯体が示す多様な熱的構造相転移とその炭素数依存性2022

    • Author(s)
      荒田 園巳、キム ユナ、星野 哲久、川崎 渉、角屋 智史、芥川 智行、山田 順一、久保 和也
    • Organizer
      日本化学会第102春季年会
    • Related Report
      2021 Research-status Report
  • [Presentation] Electrofluorochromic Device Based on a Redox-Active Europium (III) Complex2021

    • Author(s)
      Yuna KIM, Hitomi Ohmagari, Akira Saso, Nobuyuki Tamaoki, and Miki Hasegawa
    • Organizer
      JSCC symposia
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] An Electrofluorochromic Device Based on a Redox-Active Europium (III) Complex2021

    • Author(s)
      Yuna KIM, Hitomi Ohmagari, Akira Saso, Nobuyuki Tamaoki, and Miki Hasegawa
    • Organizer
      Pacifichem
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Photoresponsive cholesteric liquid crystals doped with glycomacrocyclic azobenzene derivatives exhibiting amplified mechanical functions2021

    • Author(s)
      Y. Kim, N. N. Mafy, J. Xie, S. Maisonneuve, C. Lin, N. Tamaoki
    • Organizer
      Pacifichem
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 脱プロトン化した2-フェニルピリジンとビス(アルキルチオ)-TTF-ジチオレン配位子をもつ非対称型金(Ⅲ)錯体の構造相転移2021

    • Author(s)
      荒田 園巳、井上 智仁、キム ユナ、角屋 智史、山田 順一、久保 和也
    • Organizer
      日本化学会 第101春季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 2,2’-ビピリジン誘導体とジチオレン配位子をもつ平面四配位型非対称白金錯体の電子状態と伝導材料への応用2021

    • Author(s)
      弓野 瑞季、キム ユナ、角屋 智史、山田 順一、久保 和也
    • Organizer
      日本化学会 第101春季年会
    • Related Report
      2020 Research-status Report
  • [Presentation] Electrofluorochromic device: a versatile tool to control luminescence of redox-active emitters2021

    • Author(s)
      Yuna Kim
    • Organizer
      The 3rd Australia-Belgium-Japan joint symposium on excitonics and cellular communication
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Synthesis, photochromic and chiroptical properties of photoswitchable glycomacrocycles2020

    • Author(s)
      Jinbiao Jiao, Stephane Maisonneuve, Yuna Kim, Juan Xie
    • Organizer
      5th NanoSynergestics Workshop
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Glycomacrocycle-based azobenzene derivatives as chiral dopants for photoresponsive cholesteric liquid crystals2020

    • Author(s)
      Yuna Kim, Noushaba Nusrat Mafy, Joanne Xie, Stephane Maisonneuve, Nobuyuki Tamaoki
    • Organizer
      日本化学会第100春季年会
    • Related Report
      2019 Research-status Report
  • [Presentation] Photoresponsive molecular systems for advanced optical and mechanical functions2019

    • Author(s)
      Yuna Kim
    • Organizer
      The 1st Australia-Belgium-Japan joint symposium on excitonics and cellular communication
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 非対称ジチオレン金属錯体が発現する可視光・近赤外領域における協奏的エレクトロクロミック挙動の解明2019

    • Author(s)
      堀 葵,久保 和也,キム ユナ,角屋 智史,田原 圭志朗,玉置 信之,中村 貴義,山田 順一
    • Organizer
      第13回分子科学討論会
    • Related Report
      2019 Research-status Report
  • [Presentation] Unsymmetrical Platinum Dithiolene Complexes Coordinated by 4,4'-Dinonyl-2,2'-Bipyridine: Concerted Phenomena Between Electronic Absorption and Electrochemical Properties2019

    • Author(s)
      Aoi Hori, Kazuya Kubo, Yuna Kim, Tomofumi Kadoya, Jun-ichi Yamada
    • Organizer
      The 20th RIES- HOKUDAI International Symposium
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Remarks] 2021年度日本化学会第10回女性化学者奨励賞

    • URL

      https://www.chemistry.or.jp/journal/ci22p154.pdf

    • Related Report
      2021 Research-status Report
  • [Remarks] 高導電性酸化還元型レアアースを用いたデバイスの開発にはじめて成功

    • URL

      https://www.hokudai.ac.jp/news/2020/10/post-740.html

    • Related Report
      2020 Research-status Report
  • [Patent(Industrial Property Rights)] エレクトロクロミックデバイス2021

    • Inventor(s)
      久保和也、キムユナ、堀葵
    • Industrial Property Rights Holder
      久保和也、キムユナ、堀葵
    • Industrial Property Rights Type
      特許
    • Filing Date
      2021
    • Related Report
      2020 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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