文献类型：期刊文献

英文题名：Wide blue phase range of chiral nematic liquid crystal doped with bent-shaped molecules

作者：Zheng, Zhigang[1];Shen, Dong[1];Huang, Pei[1]

机构：[1]E China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China

年份：2010

卷号：12

外文期刊名：NEW JOURNAL OF PHYSICS

收录：;EI(收录号：20105113500718);WOS:【SCI-EXPANDED(收录号:WOS:000284773400005)】；

基金：This work was supported by the National Science Foundation of China (grant no. 60878047) and Research Foundations of ECUST (grant no. yk0157125). We thank Professor Fuzi Yang (Exeter University, UK) for helpful discussions.

语种：英文

外文关键词：Defects - Nematic liquid crystals - Stereochemistry

摘要：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.