Inhomogeneous bulk nematic order reconstruction

2008 ◽  
Vol 77 (2) ◽  
Author(s):  
G. Lombardo ◽  
H. Ayeb ◽  
F. Ciuchi ◽  
M. P. De Santo ◽  
R. Barberi ◽  
...  
Keyword(s):  
Nematic Order ◽  
Order Reconstruction

Surface and bulk contributions to nematic order reconstruction

2012 ◽  
Vol 85 (6) ◽  
Author(s):  
A. Amoddeo ◽  
R. Barberi ◽  
G. Lombardo
Keyword(s):  
Nematic Order ◽  
Order Reconstruction

Dynamical numerical model for nematic order reconstruction

2008 ◽  
Vol 77 (5) ◽  
Author(s):  
G. Lombardo ◽  
H. Ayeb ◽  
R. Barberi
Keyword(s):  
Numerical Model ◽  
Nematic Order ◽  
Order Reconstruction

scholarly journals Impact of Nanoparticles on Nematic Ordering in Square Wells

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
M. Slavinec ◽  
E. Klemenčič ◽  
M. Ambrožič ◽  
M. Krašna
Keyword(s):  
Order Parameter ◽  
Liquid Crystalline ◽  
Topological Defects ◽  
Nematic Order ◽  
Parameter Correlation ◽  
Nematic Ordering ◽  
Order Reconstruction ◽  
Square Well ◽  
Cartesian Coordinate ◽  
Cell Thickness

Nematic liquid crystalline structures within square wells are studied numerically using both Lebwohl-Lasher lattice semimicroscopic and the Landau-de Gennes mesoscopic approach. At lateral boundary wall strong planar anchoring is enforced. The cell thicknesshalong thezCartesian coordinate is assumed to be smaller than the characteristic square well sizeR. Using semimicroscopic modelling we restrict to effectively two-dimensional systems which we study in terms of the tensor nematic order parameter. We consider impact of appropriate nanoparticles (NPs) on nematic configuration for cases whereRbecomes comparable to the biaxial order parameter correlation length. In this case a star-like order reconstruction biaxial profile could be formed in absence of NPs. We demonstrate existence of a rich variety of different nematic structures, including topological defects, which are enabled by presence of appropriate NPs.

scholarly journals Internal constraints and arrested relaxation in main-chain nematic elastomers

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Takuya Ohzono ◽  
Kaoru Katoh ◽  
Hiroyuki Minamikawa ◽  
Mohand O. Saed ◽  
Eugene M. Terentjev
Keyword(s):  
Mechanical Properties ◽  
Main Chain ◽  
Polymer Networks ◽  
Nematic Order ◽  
Nematic Elastomers ◽  
Nematic Director ◽  
Highly Nonlinear ◽  
Nonlinear Mechanical ◽  
Liquid Crystal Elastomers ◽  
Memory Applications

AbstractNematic liquid crystal elastomers (N-LCE) exhibit intriguing mechanical properties, such as reversible actuation and soft elasticity, which manifests as a wide plateau of low nearly-constant stress upon stretching. N-LCE also have a characteristically slow stress relaxation, which sometimes prevents their shape recovery. To understand how the inherent nematic order retards and arrests the equilibration, here we examine hysteretic stress-strain characteristics in a series of specifically designed main-chain N-LCE, investigating both macroscopic mechanical properties and the microscopic nematic director distribution under applied strains. The hysteretic features are attributed to the dynamics of thermodynamically unfavoured hairpins, the sharp folds on anisotropic polymer strands, the creation and transition of which are restricted by the nematic order. These findings provide a new avenue for tuning the hysteretic nature of N-LCE at both macro- and microscopic levels via different designs of polymer networks, toward materials with highly nonlinear mechanical properties and shape-memory applications.

scholarly journals Short range smectic order driving long range nematic order: example of cuprates

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
R. S. Markiewicz ◽  
J. Lorenzana ◽  
G. Seibold ◽  
A. Bansil
Keyword(s):  
Long Range ◽  
Short Range ◽  
Nematic Order
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