Simple method for measuring the azimuthal anchoring strength of nematic liquid crystals

2001 ◽  
Vol 79 (18) ◽  
pp. 2910-2912 ◽  
Author(s):  
João G. Fonseca ◽  
Yves Galerne
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Simple Method ◽  
Anchoring Strength

Simple method for measuring the high pretilt angle of nematic liquid crystals

2003 ◽  
Vol 93 (8) ◽  
pp. 4936-4938 ◽  
Author(s):  
Jin Seog Gwag ◽  
Seo Hern Lee ◽  
Kyoung-Ho Park ◽  
Won Sang Park ◽  
Kwan-Young Han ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Simple Method ◽  
Pretilt Angle

TRICRITICAL POINT IN ORDER-DISORDER PHASE TRANSITIONS FOR NEMATICS

1992 ◽  
Vol 06 (14) ◽  
pp. 2521-2530 ◽  
Author(s):  
G. BARBERO ◽  
L. R. EVANGELISTA ◽  
A. P. KREKHOV
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Liquid Crystals ◽  
External Field ◽  
Tricritical Point ◽  
Nematic Liquid Crystals ◽  
Complete Analysis ◽  
Disorder Phase Transition ◽  
Anchoring Strength ◽  
Strong Anchoring

A complete analysis of the order-disorder phase transition in nematic liquid crystals induced by an external field is presented. The case of nearly compensated nematics in weak anchoring situation is discussed. The investigation shows that the parameter controlling the order of the phase transition is a decreasing function of the anchoring strength. The important limiting cases of very weak and very strong anchoring are considered too.

scholarly journals Expulsion of disclinations in nematic liquid crystals

2003 ◽  
Vol 14 (1) ◽  
pp. 39-59 ◽  
Author(s):  
PAOLO BISCARI ◽  
TIMOTHY J. SLUCKIN
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Boundary Conditions ◽  
Half Space ◽  
Nematic Liquid Crystal ◽  
Nematic Liquid Crystals ◽  
Critical Value ◽  
Repulsive Force ◽  
Anchoring Strength ◽  
Strong Anchoring

We study the interactions between a nematic liquid crystal disclination and the surface of the half-space which bounds it. When strong anchoring conditions are applied on the boundary, the biaxial core of the disclination affects the repulsive force that tends to drive the disclination away from the surface. If we replace the strong boundary conditions with an anchoring potential, the surface-disclination interaction depends on the surface extrapolation length. In particular, the nematic may expel the disclination if the anchoring strength is below a critical value.

Novel Method of Measuring Surface Torsional Anchoring Strength of Nematic Liquid Crystals

1996 ◽  
Vol 35 (Part 1, No. 8) ◽  
pp. 4434-4437 ◽  
Author(s):  
Tadashi Akahane ◽  
Hideki Kaneko ◽  
Munehiro Kimura
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Measuring Surface ◽  
Novel Method ◽  
Anchoring Strength

Relationship between surface order and surface azimuthal anchoring strength of nematic liquid crystals

2004 ◽  
Vol 69 (6) ◽  
Author(s):  
Shinichiro Oka ◽  
Takashi Mitsumoto ◽  
Munehiro Kimura ◽  
Tadashi Akahane
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Anchoring Strength
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