Dynamic response of a nematic liquid crystal in silica aerogel in an external electric field

1998 ◽  
Vol 57 (6) ◽  
pp. 6732-6736 ◽  
Author(s):  
I. Drevenšek Olenik ◽  
A. Mertelj ◽  
M. Čopič
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Dynamic Response ◽  
External Electric Field ◽  
Nematic Liquid Crystal ◽  
Silica Aerogel

DYNAMIC RESPONSE OF CARBON NANOTUBES DISPERSED IN NEMATIC LIQUID CRYSTAL

NANO ◽  
2007 ◽  
Vol 02 (01) ◽  
pp. 41-49 ◽  
Author(s):  
SANG YOUN JEON ◽  
KYUNG AH PARK ◽  
IN-SU BAIK ◽  
SEOK JIN JEONG ◽  
SEOK HO JEONG ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Crystal ◽  
Electric Field ◽  
Dynamic Response ◽  
Nematic Liquid Crystal ◽  
Density Functional ◽  
Strong Electric Field ◽  
Optical Microscope ◽  
Analysis Of Dynamics ◽  
Vertical Cell

The alignment and dynamic response of carbon nanotubes (CNTs) in nematic liquid crystal (NLC) medium induced by strong electric field have been observed through polarizing optical microscope. Density-functional calculations suggest that LC molecule anchors helically to the CNT wall to enhance π-stacking with a binding energy of nearly -2.0 eV due to a considerable amount of charge transfer from LC molecule to CNT, resulting in the formation of excess charges and permanent dipole moment in CNTs. Under strong electric field, the motion of CNTs distorted the director of adjacent LC molecules. Our detailed analysis of dynamics revealed that the four-lobe textures in vertical cell and two vertical stripes in in-plane switching cell were strongly correlated, i.e., the side view of textures by the vertical motion of CNTs in vertical cell was similar to the textures in in-plane switching cell. Interestingly, the magnitude of textures in microscope was strongly dependent on the size of CNTs and the applied field strength. The statistical size distribution of textures similar to that of CNTs provided information for the degree of dispersion of CNTs.

Control of nonlinear refractive index of AuNPs doped with nematic liquid crystal under external electric field

Optik ◽  
2019 ◽  
Vol 198 ◽  
pp. 163299 ◽  
Author(s):  
H. Mbarak ◽  
A.K. Kodeary ◽  
S.M. Hamidi ◽  
E. Mohajarani ◽  
Y. Zaatar
Keyword(s):  
Refractive Index ◽  
Liquid Crystal ◽  
Electric Field ◽  
External Electric Field ◽  
Nematic Liquid Crystal ◽  
Nonlinear Refractive Index

LIQUID CRYSTLASLIGHT SCATTERING BY FLUCTUATIONS INDUCED BY AN APPLIED ELECTRIC FIELD IN A NEMATIC LIQUID CRYSTAL (APAPA)

1972 ◽  
Vol 33 (C1) ◽  
pp. C1-63-C1-67 ◽  
Author(s):  
M. BERTOLOTTI ◽  
B. DAINO ◽  
P. Di PORTO ◽  
F. SCUDIERI ◽  
D. SETTE
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Applied Electric Field

scholarly journals Modeling Static Electric Field Effect on Nematic Liquid Crystal Director Orientation in Side-Electrode Cell

2018 ◽  
Vol 173 ◽  
pp. 03002 ◽  
Author(s):  
Alexander Ayriyan ◽  
Edik Ayryan ◽  
Alexandre Egorov ◽  
Maria Dencheva-Zarkova ◽  
Georgi Hadjichristov ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Finite Difference Methods ◽  
Electric Field Effect ◽  
Dimensional Model ◽  
Static Electric Field ◽  
Electrode Cell ◽  
Field Influence ◽  
Director Orientation

A two-dimensional model of Fredericks effect was used for the investigation of the static electric field influence on nematic liquid crystal director orientation in the side-electrode cell. The solutions of the equations describing the model were obtained by finite-difference methods. Fredericks transition threshold for the central part of the cell, as well as dependencies of the distribution of the director orientation patterns on the electric field and location, were obtained. The numerical results are found to agree qualitatively with the experiment. Further investigations are needed to elucidate completely the Fredericks effect.

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