Molecular flexibility and orientational ordering of nematic liquid crystals

1991 ◽  
Vol 94 (4) ◽  
pp. 2758-2772 ◽  
Author(s):  
Demetri J. Photinos ◽  
Edward T. Samulski ◽  
Hirokazu Toriumi
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Molecular Flexibility ◽  
Orientational Ordering

Orientational ordering in nematic liquid crystals 1CB-d11dissolved in 5CB-d6

1989 ◽  
Vol 5 (3) ◽  
pp. 941-952 ◽  
Author(s):  
A. L. Bailey ◽  
G. S. Bates ◽  
E. E. Burnell ◽  
G. L. Hoatson
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Orientational Ordering

scholarly journals Competition between local disordering and global ordering fields in nematic liquid crystals

2010 ◽  
Vol 6 ◽  
Author(s):  
Matej Cvetko ◽  
Milan Ambrožič ◽  
Samo Kralj
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Anisotropy Field ◽  
Memory Effects ◽  
Isotropic Phase ◽  
Zero Temperature ◽  
Microscopic Approach ◽  
Random Anisotropy ◽  
Orientational Ordering ◽  
2D And 3D

We study the influence of external electric or magnetic field B on orientational ordering of nematic liquid crystals or of other rod-like objects (e.g. nanotubes immersed in a liquid) in the presence of random anisotropy field type of disorder. The Lebwohl–Lasher lattice type of semi-microscopic approach is used at zero temperature. Therefore, results are valid well below the transition into the isotropic phase. We calculate the correlation function of systems as a function of B, concentration p of impurities imposing random anisotropy field disorder, the disorder strength W and system dimensionality (2D and 3D systems). In order to probe memory effects we calculate correlation length ξ for random and homogeneous initial configurations. We determine the crossover fields B c(p) separating roughly the ordered and disordered regime. Memory effects are apparent only in the latter case, i.e. for B < B c. PACS numbers: 47.51.+a, 47.54.-r, 07.05.Tp, 61.30.-v

The electrohydrodynamic instability in twisted nematic liquid crystals

1994 ◽  
Vol 4 (2) ◽  
pp. 239-252 ◽  
Author(s):  
A. Hertrich ◽  
A. P. Krekhov ◽  
O. A. Scaldin
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Electrohydrodynamic Instability ◽  
Twisted Nematic

Surface disclinations in nematic liquid crystals

1975 ◽  
Vol 36 (1) ◽  
pp. 59-67 ◽  
Author(s):  
V. Vitek ◽  
M. Kléman
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals

STUDY OF NEMATIC LIQUID CRYSTALS BY MEANS OF THE GUEST DYE DICHROISM

1975 ◽  
Vol 36 (C1) ◽  
pp. C1-69-C1-76 ◽  
Author(s):  
L. M. BLINOV ◽  
V. A. KIZEL ◽  
V. G. RUMYANTSEV ◽  
V. V. TITOV
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals

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.

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