Field-induced effects in an eutectic nematic liquid crystal mixture

2003 ◽  
Vol 81 (12) ◽  
pp. 1427-1432 ◽  
Author(s):  
A K Gathania ◽  
K K Raina
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Work Function ◽  
Domain Structure ◽  
Nematic Liquid Crystal ◽  
Threshold Field ◽  
Electric Field Effects ◽  
Dc Electric Field ◽  
Substrate Surfaces ◽  
Crystal Mixture

Electric-field effects were investigated in a planar-aligned nematic liquid crystal mixture. Under a DC electric field, we observed the presence of domains. The domain structure changed near the threshold field. The effects of charge injection from the substrate surfaces were investigated. The work function is calculated using Richardson's equation.PACS No.: 61.30.Hn

Electric Field Effects on Sensitized Fluorescence Emission From Nematic Liquid Crystal Cells

1988 ◽  
Vol 158 (2) ◽  
pp. 185-196
Author(s):  
Taku Matsuo ◽  
Hiroshi Nakamura ◽  
Hiroshi Sakaguchi ◽  
Kouji Shimomura ◽  
Isamu Yoshimatsu ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Fluorescence Emission ◽  
Electric Field Effects ◽  
Sensitized Fluorescence ◽  
Field Effects ◽  
Crystal Cells

Optical properties of nematic liquid crystal (C21H27NO2S) under AC/DC electric fields

2009 ◽  
Vol 87 (4) ◽  
pp. 293-298 ◽  
Author(s):  
Mehriban Emek ◽  
Nurettin Besli ◽  
Ahmet Yildirim ◽  
Suleyman Yilmaz
Keyword(s):  
Phase Transition ◽  
Liquid Crystal ◽  
Electric Field ◽  
Domain Structure ◽  
Nematic Liquid Crystal ◽  
Electric Fields ◽  
Transition Process ◽  
Optical Methods ◽  
Rotational Angle ◽  
Dc Electric Fields

In this study, the effects of the phase transition on the optical transmittance of the nematic liquid crystal C21H27NO2S, 4′-isothiocyanatophenyl-4-pentylbicyclo[2,2,2]octane-1-carboxylate are investigated in terms of temperature variation and rotational angle of the polarizer through electro-optical methods under AC / DC electric fields. It is observed that the domain structure of the material is affected considerably by the applied electric field as the temperature changes. Under applied electric fields, the crystal-nematic (CN) phase-transition point changes and the behaviour of the liquid crystal in the phase-transition region shows some differences. The intensity of the light passing through the system under a DC electric field increases as the electric field rises. Nevertheless, the intensity of the transmitted light under an AC electric field increases at the beginning and then decreases as the electric field rises to a temperature of more than 355 K. These results can be explained through the formation of a domain structure during the phase-transition process and the light scattering caused by these structures.

FIELD INDUCED STUDIES IN CARBON NANOTUBES DOPED NEMATIC LIQUID CRYSTAL MIXTURE

2014 ◽  
Vol 4 (3) ◽  
pp. 565-570 ◽  
Author(s):  
Praveen Malik
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Crystal ◽  
Electric Field ◽  
Nematic Liquid Crystal ◽  
Optical Responses ◽  
Crystal Mixture ◽  
Current Behavior

Carbon nanotubes (CNTs) doped nematic liquid crystal (NLC) mixture of varying concentrations of CNTs in 0.0, 0.2 and0.5 wt./wt.% ratios have been prepared and studied. The effect of electric field on current behavior and optical propertiesin pure NLC and CNTs-NLC mixtures has been investigated. Dispersion of CNTs in NLC mixture increases the currentnearly 3 times. The lower concentration of CNTs leads to better optical responses

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