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Bent-Core Liquid Crystals with Crystalline Intralayer Ordering: Nanostructural Polymorphism and Piezoelectricity

Research Project

Project/Area Number 18K14094
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 28030:Nanomaterials-related
Research InstitutionTokyo University of Science

Principal Investigator

LE KHOA  東京理科大学, 理学部第二部化学科, 講師 (90725334)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords屈曲形液晶 / キラリティ / スポンジ / ねじれ構造 / 有機ナノチューブ / 選択反射 / 二次ねじれ / 構造色 / 二次ねじれ構造 / 圧電材料
Outline of Final Research Achievements

Unlike rod-like liquid crystals, bent-core or bent-shaped liquid crystals are still a topic for future practical application. They hold great potential for applications in piezoelectric materials and nano-porous materials. The most well-known B4 phase, which exhibits intralayer crystallinity, has been the most actively researched topic in recent years. We have found that mixing B4 phase liquid crystals with a solvent results in the creation of three unique nanostructures, from a single compound. Particularly a novel nanotube structure, which has never been reported before in the B4 phase, is formed. In this report, we investigate the novel properties of the B4 phase.

Academic Significance and Societal Importance of the Research Achievements

ナノチューブ構造が特筆すべきである。有機系の圧電材料と言えば、PVDF(ポリフッ化ビニリデン)はよく知られている。(ナノ)ファイバー状のPVDFは分極がファイバーと垂直な方向に向くのに対して、ナノチューブ構造はねじれ構造と同様にファイバーの方向に向くと考えられ、エネルギー変換材料としては非常に興味深い。一方、液晶研究分野の中では、他にキラルスメクチックC相(C2対称性)などのような対称性の低い液晶相を用いた圧電材料の開発もいくつか報告されたが、皆流動性が高かったため、大した結果が得られていない。本研究で述べる層内結晶性液晶相は材料工学分野において応用展開が十分に期待出来る。

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2019 Other

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

  • [Int'l Joint Research] University of Colorado, Boulder(米国)

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Nanostructural polymorphism in the low-birefringence chiral phase of an achiral bent-shaped dimer2022

    • Author(s)
      K. V. Le, M. R. Tuchband, H. Iwayama, Y. Takanishi, N. A. Clark, F. Araoka
    • Journal Title

      arXiv preprint arXiv:2210.13544

      Volume: 2210 Pages: 1-16

    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Journal Article] Observation and simulation of toron polymorphism: Effects of surface anchoring, elasticity and electric field in cholesterics with smectic-A phase beneath2022

    • Author(s)
      K. V. Le, S. Aya, J. Kougo, S. Takahashi, T. Takezoe, Y. Naka, T. Sasaki
    • Journal Title

      Journal of Molecular Liquids

      Volume: 349 Pages: 118454-118454

    • DOI

      10.1016/j.molliq.2021.118454

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Self-shaping liquid crystal droplets by balancing bulk elasticity and interfacial tension2021

    • Author(s)
      K. Peddireddy, S. Copar, K. V. Le, I. Musevic, C. Bahr, V. S. R. Jampani
    • Journal Title

      Proceedings of the National Academy of Sciences

      Volume: 118 Issue: 14

    • DOI

      10.1073/pnas.2011174118

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Self-shaping of liquid crystals into superstructures for photonic applications2021

    • Author(s)
      I. Musevic, K. Peddireddy, M. Mur, K. V. Le, S. Copar, C. Bahr, V. S. R. Jampani
    • Journal Title

      Proc. SPIE Emerging Liquid Crystal Technologies XVI

      Volume: 11707 Pages: 13-13

    • DOI

      10.1117/12.2582915

    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Helicoid and catenoid surfaces in a liquid crystalline dimer driven by surface tension2019

    • Author(s)
      Khoa V. Le
    • Organizer
      Materials Research Meeting 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Remarks] レ バン コア|論文・著書・学会発表・特許

    • URL

      https://www.tus.ac.jp/ridai/doc/ji/RIJIA01Detail.php?act=pos&kin=ken&diu=6b15

    • Related Report
      2022 Annual Research Report
  • [Remarks] レ バン コア|論文・著書・学会発表・特許

    • URL

      https://www.tus.ac.jp/fac_grad/p/achievement.php?6b15

    • Related Report
      2021 Research-status Report 2020 Research-status Report 2019 Research-status Report

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Published: 2018-04-23   Modified: 2024-01-30  

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