Chiral structures and defects of lyotropic chromonic liquid crystals induced by saddle-splay elasticity

被引：94

作者：

Davidson, Zoey S. ^{[1
]}

Kang, Louis ^{[1
]}

Jeong, Joonwoo ^{[2
]}

Still, Tim ^{[1
]}

Collings, Peter J. ^{[1
,3
]}

Lubensky, Tom C. ^{[1
]}

Yodh, A. G. ^{[1
]}

机构：

[1] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 USA

[2] Ulsan Natl Inst Sci & Technol, Dept Phys, Sch Nat Sci, Ulsan 689798, South Korea

[3] Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 USA

来源：

PHYSICAL REVIEW E | 2015年 / 91卷 / 05期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

DISTORTION-MODE APPROACH; ORIENTATIONAL ORDER; SYMMETRY BREAKING; SURFACE; CONSTANTS; ALIGNMENT; DROPLETS; ENERGY;

D O I：

10.1103/PhysRevE.91.050501

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

An experimental and theoretical study of lyotropic chromonic liquid crystals (LCLCs) confined in cylinders with degenerate planar boundary conditions elucidates LCLC director configurations. When the Frank saddle-splay modulus is more than twice the twist modulus, the ground state adopts an inhomogeneous escaped-twisted configuration. Analysis of the configuration yields a large saddle-splay modulus, which violates Ericksen inequalities but not thermodynamic stability. Lastly, we observe point defects between opposite-handed domains, and we explain a preference for point defects over domain walls.

引用

页数：5

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