Progress in radiations induced engineering of liquid crystals properties for high-performance applications

J Prakash, D Varshney, S Chauhan, A Kaushik… - Physics Reports, 2023 - Elsevier
From the time of their revelation, liquid crystals (LCs) are stimulating scientific curiosity in the
basic and applied research of these materials as they simultaneously encompass the …

Enhancement of electrical conductivity, director relaxation frequency and slope of electro-optical characteristics in the composites of single-walled carbon nanotubes …

R Verma, M Mishra, R Dhar, R Dabrowski - Liquid Crystals, 2017 - Taylor & Francis
In the present work, single-walled carbon nanotubes (SWCNTs) were dispersed in a room
temperature nematic liquid crystal 4-pentyl-4′-cyanobiphenyl at the concentration of 0.02 …

Dielectric and Electro‐Optical Properties of Antiferroelectric Liquid Crystalline Materials

MB Pandey, R Verma, R Dhar - Israel Journal of Chemistry, 2012 - Wiley Online Library
Antiferroelectric liquid crystals (AFLCs) are a recent class of materials in the family of liquid
crystals which have high prospect of application in displays with better results as compared …

Effect of γ-irradiation on liquid crystalline properties of cholesteryl pelargonate (nonanoate)

SL Srivastava, R Dhar - Radiation Physics and Chemistry, 1996 - Elsevier
Effect of Co60 γ-irradiation at a dose 500 kGy on dielectric and thermodynamic properties of
cholesteryl pelargonate (nonanoate)(ChP) has been studied by differential scanning …

Boost in the thermal stability, ionic conductivity and director relaxation frequency in the composite of liquid crystal and functionalised multi-walled carbon nanotubes

CK Patro, R Verma, A Garg, R Dhar, R Dabrowski - Liquid Crystals, 2021 - Taylor & Francis
In the present work, we have prepared a liquid crystal-carbon nanotube (LC-CNT)
composite by dispersing a low concentration of carboxylic group (-COOH) functionalised …

Study of different modes of dielectric relaxation in a newly synthesized material exhibiting ferro-, ferri-and antiferro-electric phases

MB Pandey, R Dhar, VK Agrawal, R Dabrowski… - Liquid …, 2004 - Taylor & Francis
Employing thermodynamical, optical and comprehensive dielectric studies, we have
investigated a freshly synthesized chlorinated MHPOBC analogue antiferroelectric liquid …

Low frequency dielectric spectroscopy of two room temperature chiral liquid crystal mixtures

MB Pandey, R Dhar, K Agrawal, RP Khare… - Phase …, 2003 - Taylor & Francis
Dielectric spectroscopy of two room temperature chiral liquid crystal mixtures (W-96 and W-
97) have been carried out in the frequency range of 100 mHz–10 MHz. Low frequency …

Electron beam irradiation induced transformations in the electro-optical and dielectric properties of a twisted-nematic display material 4′-pentyl-4-cyanobiphenyl …

R Verma, R Dhar, R Dabrowski… - Journal of Physics D …, 2009 - iopscience.iop.org
Abstract Changes in the electro-optical and dielectric properties of 4'-pentyl-4-
cyanobiphenyl (5CB) due to electron beam irradiation up to 20 kGy dose have been studied …

Electron beam irradiation-induced transformations in the electrical properties of 4'-octyl-4-cyanobiphenyl (8CB)

R Verma, R Dhar, VK Agrawal, MC Rath… - Liquid …, 2009 - Taylor & Francis
Changes in the dielectric and thermodynamical properties of electron beam-irradiated 4′-
octyl-4-cyanobiphenyl (8CB) were studied. Irradiation-induced changes in the phase …

Gamma irradiation induced dielectric modulation and dynamic memory in nematic liquid crystal materials

D Varshney, A Kumar, J Prakash, R Meena… - Journal of Molecular …, 2020 - Elsevier
Present studies investigate the effect of gamma irradiation in the dielectric and electro-
optical properties of a nematic liquid crystal (NLC) 4 cyano-4′-pentylbiphenyl (also referred …