Formation of three-dimensional colloidal crystals in a nematic liquid crystal

Soft Matter ◽  
2018 ◽  
Vol 14 (32) ◽  
pp. 6756-6766 ◽  
Author(s):  
Yiwei Wang ◽  
Pingwen Zhang ◽  
Jeff Z. Y. Chen
Keyword(s):  
Liquid Crystal ◽  
Crystal Structures ◽  
Nematic Liquid Crystal ◽  
Colloidal Particles ◽  
Three Dimensional ◽  
Colloidal Crystals ◽  
Dimensional Crystal

The overall three-dimensional crystal structures, formed by spherical colloids and liquid crystal molecules in the voids, are influenced by the size and the position of colloidal particles.

Three-dimensional coating flow of nematic liquid crystal on an inclined substrate

2015 ◽  
Vol 26 (5) ◽  
pp. 647-669 ◽  
Author(s):  
M. A. LAM ◽  
L. J. CUMMINGS ◽  
T.-S. LIN ◽  
L. KONDIC
Keyword(s):  
Free Surface ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Nonlinear Partial Differential Equation ◽  
Three Dimensional ◽  
Travelling Wave ◽  
Linear Stability Theory ◽  
Newtonian Flow ◽  
Surface Evolution ◽  
Coating Flow

We consider a coating flow of nematic liquid crystal (NLC) fluid film on an inclined substrate. Exploiting the small aspect ratio in the geometry of interest, a fourth-order nonlinear partial differential equation is used to model the free surface evolution. Particular attention is paid to the interplay between the bulk elasticity and the anchoring conditions at the substrate and free surface. Previous results have shown that there exist two-dimensional travelling wave solutions that translate down the substrate. In contrast to the analogous Newtonian flow, such solutions may be unstable to streamwise perturbations. Extending well-known results for Newtonian flow, we analyse the stability of the front with respect to transverse perturbations. Using full numerical simulations, we validate the linear stability theory and present examples of downslope flow of nematic liquid crystal in the presence of both transverse and streamwise instabilities.

Direct Visualization of Spatiotemporal Structure of Self-Assembled Colloidal Particles in Electrohydrodynamic Flow of a Nematic Liquid Crystal

Langmuir ◽  
2015 ◽  
Vol 31 (13) ◽  
pp. 3815-3819 ◽  
Author(s):  
Yuji Sasaki ◽  
Hikaru Hoshikawa ◽  
Takafumi Seto ◽  
Fumiaki Kobayashi ◽  
V. S. R. Jampani ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Colloidal Particles ◽  
Direct Visualization ◽  
Electrohydrodynamic Flow ◽  
Spatiotemporal Structure ◽  
Self Assembled
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