Wide blue phase range of chiral nematic liquid crystal doped with bent-shaped molecules
Wide blue phase range of chiral nematic liquid crystal doped with bent-shaped molecules
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DOI：
10.1088/1367-2630/12/11/113018
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发表时间：
2010-11-10
影响因子：
3.3
通讯作者：
Huang, Pei
中科院分区：
文献类型：
--
作者：
Zheng, Zhigang;Shen, Dong;Huang, Pei
在手性向列液晶中掺杂一种弯曲的分子，可以诱导出29摄氏度的宽蓝色相位范围。通过实验比较和分子模拟研究了这种效应的物理机制。结果表明，较宽的温度范围与掺入弯曲型分子后液晶与缺陷之间较低的界面张力以及缺陷核半径的缩小密切相关。除此之外，弯曲分子刚体的延伸导致双轴性和偶极矩的增加，这是获得稳定蓝相的另外两个重要因素。该研究为拓宽液晶蓝相提供了新的见解。
A wide blue phase range of 29 degrees C is induced by a bent-shaped molecule that is doped in chiral nematic liquid crystals. The physical mechanisms of this effect are investigated through experimental comparisons and molecular simulations. The results obtained indicate that the wide temperature range is closely related to the lower interfacial tension between liquid crystals and defects, and the shrinkage of the radius of the defect core after the bent-shaped molecules are doped in the systems. Apart from this, extending the rigid body of the bent-shaped molecules leads to an increase in the biaxiality and dipole moment, which are the two additional important factors for obtaining a stable blue phase. This study provides new insights into broadening the liquid crystal blue phase.