Modification in different physical parameters of orthoconic antiferroelectric liquid crystal mixture via the dispersion of hexanethiol capped silver nanoparticles

2021 ◽  
pp. 115840
Author(s):  
Kaushlendra Agrahari ◽  
Vivek Kumar Nautiyal ◽  
Tripti Vimal ◽  
Shivani Pandey ◽  
Sandeep Kumar ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Liquid Crystal ◽  
Physical Parameters ◽  
Crystal Mixture

Dielectric Relaxation Studies of Silver Nanoparticles dispersed Liquid Crystal

2015 ◽  
Vol 8 (3) ◽  
pp. 2176-2188 ◽  
Author(s):  
Keisham Nanao Singh
Keyword(s):  
Activation Energy ◽  
Silver Nanoparticles ◽  
Liquid Crystal ◽  
Dielectric Relaxation ◽  
Relaxation Process ◽  
Relaxation Times ◽  
Low Frequency ◽  
Bulk Liquid ◽  
Molecular Rearrangement ◽  
Relaxation Studies

This article reports on the Dielectric Relaxation Studies of two Liquid Crystalline compounds - 7O.4 and 7O.6 - doped with dodecanethiol capped Silver Nanoparticles. The liquid crystal molecules are aligned homeotropically using CTAB. The low frequency relaxation process occurring above 1 MHz is fitted to Cole-Cole formula using the software Dielectric Spectra fit. The effect of the Silver Nanoparticles on the molecular dipole dynamics are discussed in terms of the fitted relaxation times, Cole-Cole distribution parameter and activation energy. The study indicate a local molecular rearrangement of the liquid crystal molecules without affecting the order of the bulk liquid crystal molecules but these local molecules surrounding the Silver Nanoparticles do not contribute to the relaxation process in the studied frequency range. The observed effect on activation energy suggests a change in interaction between the nanoparticles/liquid crystal molecules.

Self-Regulation of Infrared Using a Liquid Crystal Mixture Doped with Push–Pull Azobenzene for Energy-Saving Smart Windows

2021 ◽  
Vol 13 (4) ◽  
pp. 5028-5033
Author(s):  
Seung-Won Oh ◽  
Seung-Min Nam ◽  
Sang-Hyeok Kim ◽  
Tae-Hoon Yoon ◽  
Wook Sung Kim
Keyword(s):  
Liquid Crystal ◽  
Energy Saving ◽  
Self Regulation ◽  
Smart Windows ◽  
Crystal Mixture

scholarly journals Design and Realization of a Compact Efficient Beam Combiner, Based on Liquid Crystal Pancharatnam–Berry Phase Gratings

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 220
Author(s):  
Boxuan Gao ◽  
Jeroen Beeckman ◽  
Kristiaan Neyts
Keyword(s):  
Liquid Crystal ◽  
Berry Phase ◽  
Polarized Light ◽  
Laser Beams ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Beam Combiner ◽  
High Diffraction Efficiency ◽  
High Diffraction ◽  
Crystal Mixture

We demonstrate a laser beam combiner based on four photo-patterned Pancharatnam–Berry (PB) phase gratings, which is compact and has high diffraction efficiency for incident circularly polarized light. The nematic liquid crystal mixture E7 is used as anisotropic material, and the thickness of the layer is controlled by spacers. The beam combiner can bring two parallel laser beams closer to each other while remaining parallel. This work shows the potential to realize components based on flat optical LC devices.

Electro-optic effects in a ferroelectric liquid crystal mixture

1989 ◽  
Vol 92 (1) ◽  
pp. 353-354
Author(s):  
D. K. Rout ◽  
R. N. P. Choudhary ◽  
G. D. Nigam
Keyword(s):  
Liquid Crystal ◽  
Ferroelectric Liquid Crystal ◽  
Electro Optic ◽  
Crystal Mixture

Numerical modelling of twisted nematic devices

1983 ◽  
Vol 309 (1507) ◽  
pp. 203-216 ◽  
Keyword(s):  
Liquid Crystal ◽  
Electric Fields ◽  
Low Cost ◽  
Three Dimensional ◽  
Physical Parameters ◽  
Crystal Layer ◽  
Liquid Crystal Layer ◽  
Chiral Nematic ◽  
Twisted Nematic ◽  
Three Dimensional Simulations

Over most of each active region in nematic and chiral nematic twist cells the motion and configuration of the liquid crystal layer does not vary appreciably with position parallel to the surfaces. In such laminar regions the statics, dynamics and optics ot the cell can be accurately simulated at low cost on a computer of moderate size, given the appropriate physical parameters. Methods and recent advances in simulation of laminar regions are reviewed. Bistable twist cells are simulated for illustration. Important problems of stability and edge effects in the presence of electric fields await solution with two- or three-dimensional simulations.

A practical liquid crystal mixture for IR applications

2003 ◽  
Vol 30 (5) ◽  
pp. 623-626 ◽  
Author(s):  
Chibing Tan ◽  
B. M. Fung
Keyword(s):  
Liquid Crystal ◽  
Crystal Mixture

Dielectric spectroscopy of ferroelectric liquid crystal mixture

2018 ◽  
Author(s):  
Pankaj Kumar ◽  
Chinky ◽  
Vandna Sharma ◽  
J. K. Kushwaha ◽  
Praveen Malik ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Dielectric Spectroscopy ◽  
Ferroelectric Liquid Crystal ◽  
Crystal Mixture
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