Determining the sum of flexoelectric coefficients in nematic liquid crystals by the capacitance method

doi:10.1088/1674-1056/23/11/116101

中国物理B ›› 2014, Vol. 23 ›› Issue (11): 116101-116101.doi: 10.1088/1674-1056/23/11/116101

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇下一篇

Determining the sum of flexoelectric coefficients in nematic liquid crystals by the capacitance method

叶文江^a, 邢红玉^a, 崔文静^b, 周璇^a, 孙玉宝^a, 张志东^a

a School of Sciences, Hebei University of Technology, Tianjin 300401, China;
b School of Physics, Nankai University, Tianjin 300071, China

收稿日期:2014-04-10 修回日期:2014-09-17 出版日期:2014-11-15 发布日期:2014-11-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11274088, 11374087, and 11304074), the Natural Science Foundation of Hebei Province, China (Grant No. A2014202123), the Research Project of Hebei Education Department, China (Grant Nos. Z2012061 and QN2014130), the Science and Technology Plan Project of Hebei Province, China (Grant No. 134576260), and the Key Subject Construction Project of Hebei Province University, China.

Determining the sum of flexoelectric coefficients in nematic liquid crystals by the capacitance method

Ye Wen-Jiang (叶文江)^a, Xing Hong-Yu (邢红玉)^a, Cui Wen-Jing (崔文静)^b, Zhou Xuan (周璇)^a, Sun Yu-Bao (孙玉宝)^a, Zhang Zhi-Dong (张志东)^a

a School of Sciences, Hebei University of Technology, Tianjin 300401, China;
b School of Physics, Nankai University, Tianjin 300071, China

Received:2014-04-10 Revised:2014-09-17 Online:2014-11-15 Published:2014-11-15
Contact: Xing Hong-Yu E-mail:hongyu_xing@163.com
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11274088, 11374087, and 11304074), the Natural Science Foundation of Hebei Province, China (Grant No. A2014202123), the Research Project of Hebei Education Department, China (Grant Nos. Z2012061 and QN2014130), the Science and Technology Plan Project of Hebei Province, China (Grant No. 134576260), and the Key Subject Construction Project of Hebei Province University, China.

摘要/Abstract

摘要： A detailed theoretical analysis of determining the sum of flexoelectric coefficients in nematic liquid crystals using the capacitance method is given. In the strong anchoring parallel aligned nematic (PAN) and hybrid aligned nematic (HAN) cells, the dependences of the capacitance on the sum of flexoelectric coefficients and the applied voltage are obtained by numerical simulations, and the distributions of the director and the electric potential for different applied voltages and flexoelectric coefficients are also given. Based on this theoretical analysis, we propose an experimental design for measuring the capacitance of a liquid crystal cell using the improved precision LCR meter E4980A (Agilent). Through comparing the experimental data with the simulated results, the sum of flexoeletric coefficients can be determined.

关键词: flexoelectricity, capacitance, parallel aligned nematic and hybrid aligned nematic liquid crystals

Abstract: A detailed theoretical analysis of determining the sum of flexoelectric coefficients in nematic liquid crystals using the capacitance method is given. In the strong anchoring parallel aligned nematic (PAN) and hybrid aligned nematic (HAN) cells, the dependences of the capacitance on the sum of flexoelectric coefficients and the applied voltage are obtained by numerical simulations, and the distributions of the director and the electric potential for different applied voltages and flexoelectric coefficients are also given. Based on this theoretical analysis, we propose an experimental design for measuring the capacitance of a liquid crystal cell using the improved precision LCR meter E4980A (Agilent). Through comparing the experimental data with the simulated results, the sum of flexoeletric coefficients can be determined.

Key words: flexoelectricity, capacitance, parallel aligned nematic and hybrid aligned nematic liquid crystals

中图分类号: (Continuum models and theories of liquid crystal structure)

61.30.Dk

77.84.Nh (Liquids, emulsions, and suspensions; liquid crystals)

叶文江, 邢红玉, 崔文静, 周璇, 孙玉宝, 张志东. Determining the sum of flexoelectric coefficients in nematic liquid crystals by the capacitance method[J]. 中国物理B, 2014, 23(11): 116101-116101.

Ye Wen-Jiang (叶文江), Xing Hong-Yu (邢红玉), Cui Wen-Jing (崔文静), Zhou Xuan (周璇), Sun Yu-Bao (孙玉宝), Zhang Zhi-Dong (张志东). Determining the sum of flexoelectric coefficients in nematic liquid crystals by the capacitance method[J]. Chin. Phys. B, 2014, 23(11): 116101-116101.

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Determining the sum of flexoelectric coefficients in nematic liquid crystals by the capacitance method

Determining the sum of flexoelectric coefficients in nematic liquid crystals by the capacitance method

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