scholarly journals Morphogenesis of liquid crystal topological defects during the nematic-smectic A phase transition

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Min-Jun Gim ◽  
Daniel A. Beller ◽  
Dong Ki Yoon
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Topological Defects ◽  
Smectic A ◽  
Smectic A Phase

scholarly journals Optical Microscopy Observations and Construction of Dupin Cyclides at the Isotropic/Smectic A Phase Transition

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4539
Author(s):  
Mikhael Halaby Macary ◽  
Gauthier Damême ◽  
Antoine Gibek ◽  
Valentin Dubuffet ◽  
Benoît Dupuy ◽  
...  
Keyword(s):  
Phase Transition ◽  
Numerical Simulation ◽  
Liquid Crystal ◽  
Optical Microscopy ◽  
Smectic A ◽  
Polarized Microscopy ◽  
Smectic A Phase ◽  
Dupin Cyclides

In this work, we are interested in the nucleation of bâtonnets at the Isotropic/Smectic A phase transition of 10CB liquid crystal. Very often, these bâtonnets are decorated with a large number of focal conics. We present here an example of a bâtonnet obtained by optical crossed polarized microscopy in a frequently observed particular area of the sample. This bâtonnet presents bulges and one of them consists of a tessellation of ellipses. These ellipses are two by two tangent, one to each other, and their confocal hyperbolas merge at the apex of the bâtonnet. We propose a numerical simulation with Python software to reproduce this tiling of ellipses as well as the shape of the smectic layers taking the well-known shape of Dupin cyclides within this particular bâtonnet area.

Liquid crystal gelators with photo-responsive and AIE properties

2018 ◽  
Vol 2 (12) ◽  
pp. 2245-2253 ◽  
Author(s):  
Xia Yu ◽  
Hui Chen ◽  
Xiang Shi ◽  
Pierre-Antoine Albouy ◽  
Jia Guo ◽  
...  
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Isotropic Phase ◽  
Aggregation Induced Emission ◽  
Smectic A ◽  
Smectic A Phase

trans-Cn-Chol present smectic A phase and photo-responsive SmA–isotropic phase transition, and their organogels exhibit aggregation-induced emission and photo-responsive gel–sol transition.

Isotropic to smectic-A phase transition in taper-shaped liquid crystal

2021 ◽  
Vol 329 ◽  
pp. 115539
Author(s):  
Bhaskar Chandra Khan ◽  
Prabir K. Mukherjee
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Smectic A ◽  
Smectic A Phase

scholarly journals Topological defects and geometric memory across the nematic–smectic A liquid crystal phase transition

Soft Matter ◽  
2019 ◽  
Author(s):  
Ahram Suh ◽  
Min-Jun Gim ◽  
Daniel Beller ◽  
Dong Ki Yoon
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Topological Defects ◽  
Crystal Phase ◽  
Liquid Crystal Phase ◽  
Smectic A ◽  
Crystal Phase Transition ◽  
Liquid Crystal Phase Transition

We study transformations of self-organised defect arrays at the nematic–smectic A liquid crystal phase transition, and show that these defect configurations are correlated, or “remembered”, across the phase transition.

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