Flexoelectric polarization in hybrid nematic films.
Flexoelectric polarization in hybrid nematic films.
复制标题
混合向列薄膜中的挠曲电极化。
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
H. Takezoe
中科院分区：
文献类型：
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作者：
D. Link;M. Nakata;Y. Takanishi;K. Ishikawa;H. Takezoe
在面内电场作用下，研究了向列相液晶五基氰联苯（5CB）在甘油表面的杂化膜。在这种几何结构中，有一个宏观的挠性电极化P(f)，在薄膜平面上有一个与场线性耦合的分量。在这里，我们报告了电场和薄膜厚度对被电场捕获的2 π重定向（2 π壁）宽度的依赖关系，并基于连续介质弹性理论解释了这些观察结果。我们发现挠曲电系数之差为e(1)-e(3)=+ 11pc /m。
Hybrid films of the nematic liquid crystal penthylcyanobiphenyl (5CB) on the surface of glycerol were studied in the presence of an in-plane electric field. In this geometry there is a macroscopic flexoelectric polarization P(f) with a component in the film plane that couples linearly to the field. Here we report the electric field and film thickness dependence of the width of the 2pi reorientations (2pi walls) in the c director that are trapped by the field and interpret these observations based on continuum elastic theory. We find the difference between the flexoelectric coefficients to be e(1)-e(3)=+11 pC/m.