中国物理B ›› 2024, Vol. 33 ›› Issue (8): 87702-087702.doi: 10.1088/1674-1056/ad4cd7

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Dielectric anisotropy in liquid crystal mixtures with nematic and smectic phases

Xing-Zhou Tang(汤星舟)1,†, Jia-Yao Ye(叶家耀)1,†, Zi-Ye Wang(王子烨)1, Hao-Yi Jiang(姜皓译)1, Xiao-Hu Shang(尚小虎)1, Zhao-Yan Yang(杨朝雁)1,‡, and Bing-Xiang Li(李炳祥)1,2,§   

  1. 1 Nanjing University of Posts and Telecommunications, College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing 210023, China;
    2 National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210023, China
  • 收稿日期:2024-03-11 修回日期:2024-04-29 出版日期:2024-08-15 发布日期:2024-07-23
  • 通讯作者: Zhao-Yan Yang, Bing-Xiang Li E-mail:zyyang@njupt.edu.cn;bxli@njupt.edu.cn
  • 基金资助:
    Project supported by the National Key Research and Development Program of China (Grant No. 2022YFA1405000), the National Natural Science Foundation of China (Grant No. 62375141), the Natural Science Foundation of Jiangsu Province, Major Project (Grant No. BK20212004), and the Natural Science Research Start-up Foundation of Recruiting Talents of Nanjing University of Posts and Telecommunications (Grant Nos. NY222122 and NY222105).

Dielectric anisotropy in liquid crystal mixtures with nematic and smectic phases

Xing-Zhou Tang(汤星舟)1,†, Jia-Yao Ye(叶家耀)1,†, Zi-Ye Wang(王子烨)1, Hao-Yi Jiang(姜皓译)1, Xiao-Hu Shang(尚小虎)1, Zhao-Yan Yang(杨朝雁)1,‡, and Bing-Xiang Li(李炳祥)1,2,§   

  1. 1 Nanjing University of Posts and Telecommunications, College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing 210023, China;
    2 National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210023, China
  • Received:2024-03-11 Revised:2024-04-29 Online:2024-08-15 Published:2024-07-23
  • Contact: Zhao-Yan Yang, Bing-Xiang Li E-mail:zyyang@njupt.edu.cn;bxli@njupt.edu.cn
  • Supported by:
    Project supported by the National Key Research and Development Program of China (Grant No. 2022YFA1405000), the National Natural Science Foundation of China (Grant No. 62375141), the Natural Science Foundation of Jiangsu Province, Major Project (Grant No. BK20212004), and the Natural Science Research Start-up Foundation of Recruiting Talents of Nanjing University of Posts and Telecommunications (Grant Nos. NY222122 and NY222105).

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摘要： The modulation of dielectric anisotropy ($\Delta \varepsilon $) is pivotal for elucidating molecular interactions and directing the alignment of liquid crystals. In this study, we combine liquid crystals with opposing dielectric anisotropies to explore the impact of varying concentrations on their properties. We report the sign-reversal of $\Delta \varepsilon $ in both the nematic and smectic A phases of these mixed liquid crystals, alongside a dual-frequency behaviour across a broad temperature spectrum. Our research further quantifies the influence of mixture ratios under various temperatures and electric field frequencies. This exploration may pave the way for the discovery of new physical phenomena.

关键词: mixed liquid crystal, dielectric anisotropy, tunable, nematic, smectic

Abstract: The modulation of dielectric anisotropy ($\Delta \varepsilon $) is pivotal for elucidating molecular interactions and directing the alignment of liquid crystals. In this study, we combine liquid crystals with opposing dielectric anisotropies to explore the impact of varying concentrations on their properties. We report the sign-reversal of $\Delta \varepsilon $ in both the nematic and smectic A phases of these mixed liquid crystals, alongside a dual-frequency behaviour across a broad temperature spectrum. Our research further quantifies the influence of mixture ratios under various temperatures and electric field frequencies. This exploration may pave the way for the discovery of new physical phenomena.

Key words: mixed liquid crystal, dielectric anisotropy, tunable, nematic, smectic

中图分类号:  (Liquids, emulsions, and suspensions; liquid crystals)

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