scholarly journals New insights into the nature of semi-soft elasticity and “mechanical-Fréedericksz transitions” in liquid crystal elastomers

Soft Matter ◽  
2018 ◽  
Vol 14 (8) ◽  
pp. 1301-1310 ◽  
Author(s):  
Devesh Mistry ◽  
Philip B. Morgan ◽  
John H. Clamp ◽  
Helen F. Gleeson
Keyword(s):  
Liquid Crystal ◽  
Order Parameter ◽  
Freedericksz Transition ◽  
Load Curve ◽  
Fréedericksz Transition ◽  
Soft Elasticity ◽  
Liquid Crystal Elastomers

Previously unseen coincidence of a semi-soft elastic-like load curve with a “mechanical-Fréedericksz transition” and negative liquid crystal order parameter (S).

scholarly journals Dynamics of a liquid crystal close to the Fréedericksz transition

2013 ◽  
Vol 104 (2) ◽  
pp. 26004 ◽  
Author(s):  
A. Caussarieu ◽  
A. Petrosyan ◽  
S. Ciliberto
Keyword(s):  
Liquid Crystal ◽  
Freedericksz Transition ◽  
Fréedericksz Transition

Deuteron NMR investigation on orientational order parameter in polymer dispersed liquid crystal elastomers

2020 ◽  
Vol 22 (40) ◽  
pp. 23064-23072
Author(s):  
Andraž Rešetič ◽  
Jerneja Milavec ◽  
Valentina Domenici ◽  
Blaž Zupančič ◽  
Alexej Bubnov ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Order Parameter ◽  
Orientational Order ◽  
Orientational Order Parameter ◽  
Liquid Crystal Elastomer ◽  
H Nmr ◽  
Polymer Dispersed Liquid Crystal ◽  
Polymer Dispersed ◽  
Liquid Crystal Elastomers ◽  
Magnetically Aligned

Orientational order parameter of magnetically aligned liquid crystal elastomer particles suspended in a cured silicone matrix is assessed using 2H-NMR spectroscopy. Obtained results correspond well with the composite's thermomechanical response.

scholarly journals Electrically controllable liquid crystal random lasers below the Fréedericksz transition threshold

2011 ◽  
Vol 19 (3) ◽  
pp. 2391 ◽  
Author(s):  
Chia-Rong Lee ◽  
Jia-De Lin ◽  
Bo-Yuang Huang ◽  
Shih-Hung Lin ◽  
Ting-Shan Mo ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Freedericksz Transition ◽  
Random Lasers ◽  
Fréedericksz Transition

“Soft elasticity” — deformation without resistance in liquid crystal elastomers

1994 ◽  
Vol 4 (1) ◽  
pp. 93-102 ◽  
Author(s):  
M. Warner ◽  
P. Bladon ◽  
E. M. Terentjev
Keyword(s):  
Liquid Crystal ◽  
Soft Elasticity ◽  
Liquid Crystal Elastomers

Quanta Energy Level Structure and the First-Order Freedericksz Transition of Weak Anchoring NLC Cells

2010 ◽  
Vol 428-429 ◽  
pp. 402-405
Author(s):  
Rong Hua Guan
Keyword(s):  
Liquid Crystal ◽  
Energy Level ◽  
Energy Levels ◽  
Level Structure ◽  
Stable State ◽  
Freedericksz Transition ◽  
Energy Level Structure ◽  
First Order ◽  
Liquid Crystal System ◽  
Fréedericksz Transition

The energy problem of weak anchoring nematic liquid crystal (NLC) cell is investigated. For given system, there are four solutions satisfying mechanical equilibrium conditions simultaneity under certain condition. Liquid crystal system exist quanta energy level. The values and sequence of energy levels related to the change of external field and anchoring parameters. The state with the smallest energy is the stable state and the others are metastable states, which are separated by the energy barriers. The Freedericksz transition can be considered as the director slippage through these barriers to the lowest energy level and the first order transition and bistable state result from the existence of the multiple disturbed solutions.

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