New characteristics of electrohydrodynamic instability in a nematic liquid crystal doped with a cholesteric one

被引:3
|
作者
Huh, JH [1 ]
Akasako, Y
Kai, S
机构
[1] Kyushu Inst Technol, Fac Comp Sci & Syst Engn, Dept Mech Informat Sci, Fukuoka 8208502, Japan
[2] Kyushu Univ, Dept Appl Quantum Phys, Fac Engn, Fukuoka 8128581, Japan
[3] Kyushu Univ, Grad Sch Syst Life Sci, Fukuoka 8128581, Japan
关键词
electrohydrodynamic instability; liquid crystal; helical pitch;
D O I
10.1143/JPSJ.73.2975
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We report electroconvection in a cholesteric liquid crystal with negative dielectric anisotropy, that is, a mixture of p-methoxy benzilidene p-n-butylaniline (MBBA) with a small amount of a cholesteric dopant cholesteryl nonanoate (CN). By changing the corresponding helical pitch by varying the concentration of CN, a variety of ac-driven convective patterns are found in sandwiched sample cells. The pitch and temperature dependences of their threshold voltages and characteristic wavelength of the patterns are systematically investigated.
引用
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页码:2975 / 2978
页数:4
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