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Determination of Rotational Viscosity and Pretilt Angle in Nematic Liquid Crystals from Transient Current: Influence of Ionic Conduction

 

作者: M. Imai,   H. Naito,   M. Okuda,   A. Sugimura,  

 

期刊: Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals  （Taylor Available online 1995）
卷期: Volume 259, issue 1  

页码: 37-46

 

ISSN:1058-725X

 

年代: 1995

 

DOI:10.1080/10587259508038671

 

出版商: Taylor & Francis Group

 

关键词: Nematic liquid crystal;rotational viscosity;pretilt angle;impurity ion;transient current

 

数据来源: Taylor

 

摘要:

A method is described for the measurement of the rotational viscosityy1in nematic liquid crystal cell assemblies. Theoretical formulas to determiney1from transient current are developed by considering both director rotation and conduction of impurity ions. The pretilt angle and the product of the drift mobility and density of the ions are also obtained with the method. Experimental results for 4-pentyl-4′-cyano biphenyl cells with or without polyimide alignment layers are reported.

 

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