Transition of an oriented nematic liquid crystal to a glass with a nematic order - determination of the order parameter

1975 ◽  
Vol 54 (5) ◽  
pp. 393-395 ◽  
Author(s):  
Y. Poggi ◽  
R. Aleonard ◽  
J. Robert
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Order Parameter ◽  
Nematic Order ◽  
Order Determination

scholarly journals Controlled Nanoparticle Targeting and Nanoparticle-Driven Nematic Structural Transition

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
A. V. Dubtsov ◽  
S. V. Pasechnik ◽  
D. V. Shmeliova ◽  
S. Kralj ◽  
R. Repnik
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Order Parameter ◽  
Structural Transition ◽  
General Mechanism ◽  
Type Model ◽  
Simple Estimate ◽  
Low Concentration ◽  
Nematic Order

We study experimentally and theoretically controlled targeting of specific nanoparticles (NPs) to different regions within nematic liquid crystal. Using a simple mesoscopic Landau-de Gennes-type model in terms of a tensor nematic order parameter, we demonstrate a general mechanism which could be exploited for controlled targeting of NPs within a spatially nonhomogeneous nematic texture. Furthermore, we experimentally demonstrate using polarising microscopy that even a relatively low concentration of localised appropriate NPs could trigger a nematic structural transition. A simple estimate is derived to account for the observed transition.

Determination of the order parameter in nematic liquid crystal confined to anopore membranes

1997 ◽  
Author(s):  
Stanislaw A. Rozanski ◽  
Friedrich Kremer ◽  
Ralf Stannarius ◽  
Herbert Groothues
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Order Parameter

Determination of Temperature Dependence of Kerr Constant for Nematic Liquid Crystal

2011 ◽  
Vol 544 (1) ◽  
pp. 227/[1215]-231/[1219] ◽  
Author(s):  
M. H. Majles Ara ◽  
S. H. Mousavi ◽  
M. Rafiee ◽  
M. S. Zakerhamidi
Keyword(s):  
Liquid Crystal ◽  
Temperature Dependence ◽  
Nematic Liquid Crystal ◽  
Kerr Constant

Refractive index measurements and order parameter determination of the liquid crystal p-ethoxybenzilidene-p-n-butylaniline

1981 ◽  
Vol 59 (4) ◽  
pp. 515-520 ◽  
Author(s):  
P. Palffy-Muhoray ◽  
D. A. Balzarini
Keyword(s):  
Refractive Index ◽  
Liquid Crystal ◽  
Order Parameter ◽  
Orientational Order ◽  
Parameter Determination ◽  
Refractive Indices ◽  
Temperature Changes ◽  
Interferometric Technique ◽  
Anisotropic Fluids

Using a simple new interferometric technique, the ordinary and extraordinary refractive indices of the nematic liquid crystal p-ethoxybenzilidene-p-n-butylaniline have been measured separately as a function of temperature. Changes in the refractive indices have been measured with an accuracy of ±0.005% and the absolute values with an accuracy of ±0.5%. Thermal expansivity data has been obtained by utilizing a specially constructed thermometer containing the sample. By using a recently developed Clausius–Mossotti relation for anisotropic fluids, the effective molecular polarizability and hence the orientational order parameter have been obtained from refractive index and density measurements as a function of temperature.

Domains In Nematic Elastomers

1993 ◽  
Vol 328 ◽  
Author(s):  
A. Ten Bosch ◽  
L. Varichon
Keyword(s):  
Liquid Crystal ◽  
Mechanical Stress ◽  
Stress Tensor ◽  
Elastic Deformation ◽  
Order Parameter ◽  
Side Chain ◽  
Elastic Model ◽  
Liquid Crystal Elastomer ◽  
Nematic Order ◽  
Nematic Elastomers

ABSTRACTA theory based on an elastic model and including coupling between elastic deformation and nematic order parameter as well as an interaction between crosslinks and orientation is given. The nematic order parameter and the stress tensor have been determined on elongation and as a function of temperature as well as he anisotropy of the conformation of a side chain liquid crystal elastomer on application of a mechanical stress. A transition from a turbid, low ordered polydomain phase to a transparent, Monodomain is shown to occur.

Determination of the unified surface-anchoring energy of a nematic liquid crystal on a polymer substrate

1998 ◽  
Vol 72 (3) ◽  
pp. 329-331 ◽  
Author(s):  
Akihiko Sugimura ◽  
Tetsuo Miyamoto ◽  
Makoto Tsuji ◽  
Michiyoshi Kuze
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Polymer Substrate ◽  
Surface Anchoring ◽  
Anchoring Energy
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