Topological Defects in Liquid Crystal Films

2007 ◽  
Vol 47 (6) ◽  
pp. 1125-1128
Author(s):  
Duan Yi-Shi ◽  
Zhao Li ◽  
Zhang Xin-Hui ◽  
Si Tie-Yan
Keyword(s):  
Liquid Crystal ◽  
Topological Defects ◽  
Liquid Crystal Films ◽  
Crystal Films

Simulations of Topological Defects in Nematic Liquid Crystal Films

2003 ◽  
Vol 398 (1) ◽  
pp. 195-206 ◽  
Author(s):  
Cesare Chiccoli ◽  
Paolo Pasini ◽  
Ivan Feruli ◽  
Claudio Zannoni
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Topological Defects ◽  
Liquid Crystal Films ◽  
Crystal Films

scholarly journals Capillary-induced giant elastic dipoles in thin nematic films

2015 ◽  
Vol 112 (48) ◽  
pp. 14771-14776 ◽  
Author(s):  
Haifa Jeridi ◽  
Mohamed A. Gharbi ◽  
Tahar Othman ◽  
Christophe Blanc
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Self Assembly ◽  
Spatial Organization ◽  
Topological Defects ◽  
Colloidal Systems ◽  
True Self ◽  
Liquid Crystal Films ◽  
The Matrix ◽  
Crystal Films

Directed and true self-assembly mechanisms in nematic liquid crystal colloids rely on specific interactions between microparticles and the topological defects of the matrix. Most ordered structures formed in thin nematic cells are thus based on elastic multipoles consisting of a particle and nearby defects. Here, we report, for the first time to our knowledge, the existence of giant elastic dipoles arising from particles dispersed in free nematic liquid crystal films. We discuss the role of capillarity and film thickness on the dimensions of the dipoles and explain their main features with a simple 2D model. Coupling of capillarity with nematic elasticity could offer ways to tune finely the spatial organization of complex colloidal systems.

Attractive mode force microscopy of chiral liquid crystal surfaces

1992 ◽  
Vol 50 (1) ◽  
pp. 268-269
Author(s):  
B.D. Terris ◽  
R. J. Twieg ◽  
C. Nguyen ◽  
G. Sigaud ◽  
H. T. Nguyen
Keyword(s):  
Liquid Crystal ◽  
Crystal Surfaces ◽  
Free Surfaces ◽  
Control Range ◽  
Force Microscopy ◽  
Liquid Crystal Films ◽  
Chiral Liquid Crystal ◽  
Crystal Films ◽  
Electrostatic Charging ◽  
And Shifts

We have used a force microscope in the attractive, or noncontact, mode to image a variety of surfaces. In this mode, the microscope tip is oscillated near its resonant frequency and shifts in this frequency due to changes in the surface-tip force gradient are detected. We have used this technique in a variety of applications to polymers, including electrostatic charging, phase separation of ionomer surfaces, and crazing of glassy films.Most recently, we have applied the force microscope to imaging the free surfaces of chiral liquid crystal films. The compounds used (Table 1) have been chosen for their polymorphic variety of fluid mesophases, all of which exist within the temperature control range of our force microscope.

Dynamics of tilted hexatic phases in liquid-crystal films

1991 ◽  
Vol 1 (11) ◽  
pp. 1363-1373 ◽  
Author(s):  
Jonathan V. Selinger
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystal Films ◽  
Crystal Films

scholarly journals Annihilation of point defect pairs in freely suspended liquid-crystal films

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Amine Missaoui ◽  
Kirsten Harth ◽  
Peter Salamon ◽  
Ralf Stannarius
Keyword(s):  
Liquid Crystal ◽  
Point Defect ◽  
Liquid Crystal Films ◽  
Crystal Films ◽  
Freely Suspended

Kinetics of Droplet Formation in UV-Cured Polymer-Dispersed Liquid Crystal Films

1994 ◽  
Vol 33 (Part 1, No. 5A) ◽  
pp. 2641-2647 ◽  
Author(s):  
Vasilii G. Nazarenko ◽  
Seshu Sarala ◽  
Nelamangala V. Madhusudana
Keyword(s):  
Liquid Crystal ◽  
Droplet Formation ◽  
Liquid Crystal Films ◽  
Polymer Dispersed Liquid Crystal ◽  
Crystal Films ◽  
Polymer Dispersed ◽  
Kinetics Of
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