Study on concentric configuration of nematic liquid crystal droplet by Landau-de Gennes theory

2020 ◽  
Vol 47 (11) ◽  
pp. 1698-1707
Author(s):  
Jinbing Wu ◽  
He Ma ◽  
Sibo Chen ◽  
Xuan Zhou ◽  
Zhidong Zhang
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Liquid Crystal Droplet ◽  
Gennes Theory

New structure induced by elastic anisotropy in cylindrical nematic liquid crystal

2017 ◽  
Vol 13 (2) ◽  
pp. 4705-4717
Author(s):  
Zhang Qian ◽  
Zhou Xuan ◽  
Zhang Zhidong
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Nematic Liquid Crystal ◽  
Elastic Anisotropy ◽  
Nematic Liquid Crystals ◽  
Gennes Theory

Basing on Landau–de Gennes theory, this study investigated the chiral configurations of nematic liquid crystals confined to cylindrical capillaries with homeotropic anchoring on the cylinder walls. When the elastic anisotropy (L2/L1) is large enough, a new structure results from the convergence of two opposite escape directions of the heterochiral twist and escape radial (TER) configurations. The new defect presents when L2/L1≥7 and disappears when L2/L1<7. The new structure possesses a heterochiral hyperbolic defect at the center and two homochiral radial defects on both sides. The two radial defects show different chiralities.

CARS Microscopic Observation of a Nematic Liquid Crystal Droplet in an Electric Field

2013 ◽  
Vol 63 (4) ◽  
pp. 466-472
Author(s):  
Jin-Soon PARK* ◽  
Jong-Hyun KIM ◽  
Eun Seong LEE ◽  
Ju Hyun PARK ◽  
Satoshi KAWATA
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Microscopic Observation ◽  
Liquid Crystal Droplet

scholarly journals Electrically reconfigurable split ring resonator covered by nematic liquid crystal droplet

2016 ◽  
Vol 24 (24) ◽  
pp. 27096 ◽  
Author(s):  
Kepeng Qiu ◽  
Ning Jia ◽  
Zijun Liu ◽  
Chen Wu ◽  
Yuancheng Fan ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Ring Resonator ◽  
Split Ring Resonator ◽  
Split Ring ◽  
Liquid Crystal Droplet

scholarly journals Order reconstruction patterns in nematic liquid crystal wells

2014 ◽  
Vol 470 (2169) ◽  
pp. 20140276 ◽  
Author(s):  
Samo Kralj ◽  
Apala Majumdar
Keyword(s):  
Liquid Crystal ◽  
Cross Section ◽  
Nematic Liquid Crystal ◽  
Correlation Length ◽  
Critical Threshold ◽  
Two Dimensional ◽  
Liquid Crystal Material ◽  
Order Reconstruction ◽  
Anchoring Strength ◽  
Gennes Theory

We numerically study structural transitions inside shallow sub-micrometre scale wells with square cross section, filled with nematic liquid crystal material. We model the wells within the Landau–de Gennes theory. We obtain two qualitatively different states: (i) the diagonal state with defects for relatively large wells with lateral dimension greater than a critical threshold and (ii) a new, two-dimensional star-like biaxial order reconstruction pattern called the well order-reconstruction structure (WORS), for wells smaller than the critical threshold. The WORS is defined by an uniaxial cross connecting the four vertices of the square cross section. We numerically compute the critical threshold in terms of the bare biaxial correlation length and study its dependence on the temperature and on the anchoring strength on the lateral well surfaces.

Dynamics of ethyl cellulose nanoparticle self-assembly at the interface of a nematic liquid crystal droplet

2017 ◽  
Vol 19 (36) ◽  
pp. 24955-24960 ◽  
Author(s):  
Yining Han ◽  
Navid Bizmark ◽  
Nasser Mohieddin Abukhdeir ◽  
Marios A. Ioannidis
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Self Assembly ◽  
Ethyl Cellulose ◽  
Crystal Water ◽  
General Methodology ◽  
Liquid Crystal Droplet

A general methodology for the assessment of nanoparticle adsorption at the liquid crystal–water interfaces.

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