We prepared composites of a liquid crystalline material, 4-pentylphenyl 4-octyloxybenzoate (4PP4OB) and cadmium selenide quantum dots (CdSe-QDs) investigated their thermodynamic, electro-optical dielectric properties. The effect QDs on transition temperature from isotropic to nematic smectic A phases was evaluated in this study. CdSe-QDs inclusion various display parameters host crystals studied the phase. electrical – relative permittivity, anisotropy, loss relaxation were phases. changes...

In the present work, single-walled carbon nanotubes (SWCNTs) were dispersed in a room temperature nematic liquid crystal 4-pentyl-4′-cyanobiphenyl at concentration of 0.02 and 0.05 wt%. Differential scanning calorimetry temperature-dependent dielectric studies suggest decrease clearing composite materials as compared to pure material. Ionic conductivity increases by two orders magnitude due dispersion such low (0.05 wt%) SWCNTs. Dielectric also show that presence SWCNTs decreases effective...

Purpose: This study investigates enhancements to maximise the efficiency and performance of single-slope solar still for sustainable water solutions. Design/Methodology/Approach: research focuses on design a (single-slope) integration with phase change materials (PCMs), reflective mirrors, black dye into augment its improvement in efficiency. PCMs, such as paraffin wax, are known their latent heat storage, sustaining higher temperatures within enhance evaporation. Findings: The found that...

Abstract Thermodynamical, dielectric and electro-optical studies of a ferroelectric nanopowder (0.5 weight % Barium Titanate, BaTiO3) dispersed in 4-(trans-4-n-hexylcyclohexyl) isothiocyanatobenzoate (6CHBT) have been carried out. Change the anisotropy, relaxation frequency activation energy an observed non-collective mode, threshold switching voltages electro-optic response (transmission-voltage characteristic) determined for pure samples their nematic mesophases. These suggest that...

Changes in the electro-optical and dielectric properties of 4'-pentyl-4-cyanobiphenyl (5CB) due to electron beam irradiation up 20 kGy dose have been studied. Dielectric spectroscopy for planar homeotropic aligned samples has carried out frequency range 100 Hz–35 MHz. Threshold switching voltages, anisotropy, relaxation frequency, strength, distribution parameter activation energy an observed mode determined as a function dose. The experiments show that steepness transmission–voltage curve...

Abstract Changes in the dielectric and thermodynamical properties of electron beam-irradiated 4′-octyl-4-cyanobiphenyl (8CB) were studied. Irradiation-induced changes phase transition temperature, anisotropy, relaxation frequency activation energy an observed non-collective mode corresponding to molecular rotation about short axis determined both nematic smectic Ad phases. In phase, anisotropy increased for a small dose but decreased relatively high dose, whereas due irradiation. The pure...

Electron beam irradiation studies on 4′-pentyl-4-cyanobiphenyl (5CB) have been carried out. Dielectric measurements demonstrate that even a low level of (beyond critical dose ∼6kGy) results in dramatic increase the transverse component dielectric permittivity, and corresponding decrease anisotropy. It is shown changes parameters due to can be fruitfully utilized control display performance device certain extent. The observed change attributed formation donor-acceptor type charge-transfer...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> In this paper, we report the effect of electron beam irradiation on various display parameters (threshold voltage, anisotropy relative dielectric permittivity, splay elastic constant, switching voltage and hence, steepness transmission curve) a room temperature twisted nematic material, namely 4-(trans-4'-hexylcyclohexyl) isothiocyanatobenzoates (6CHBT). It has been observed that 6CHBT improve...

Contamination of industrial water by suspended materials such as mud, dirt, turbidity, organic matter and decaying vegetation can be a serious operational problem besides reducing its aesthetic quality. The clarity is affected due to overloading the clarifier during rainy season when turbidity high. problems encountered alum lime treatment programme improvement clarification raw using diallyl dimethyl ammonium chloride (DADMAC), hetero-ally-cyclic polymer are discussed. This paper discusses...

Abstract Antiferroelectric liquid crystals (AFLCs) are a recent class of materials in the family which have high prospect application displays with better results as compared to conventional nematic displays. Beside technological applications, AFLCs very interesting from point view basic studies soft condensed matter systems these showing various new sub‐phases, viz. SmC α * , β γ and many others distinct macroscopic properties narrow temperature region addition most common wide‐range...

Carbon nanotubes have been widely studied for their applications in sensors due to promising physical and chemical properties. In this paper, we explore the potential of applying carbon gas sensing equipment. The sensor uses an antenna detect change return loss from normal operating frequency on exposure different polar non-polar gases. help amplify shift improve sensitivity. presented study shows that can provide a identify various Simulation results A SYS High Frequency Software proof...

The display parameters and the stability of various mesophases a newly synthesised racemic mixture anti-ferroelectric liquid crystals (AFLCs) have been boosted with help electron beam irradiation. has phase sequence isotropic–smectic C–smectic CA crystal. effective macroscopic polarisation transition temperatures irradiated increased as compared pure mixture. from 21 to 27 nC/cm2 due From studies, we observed that temperature range smectic by 20.6°C marginal decrease in C phase.

In the present work, we have prepared a liquid crystal-carbon nanotube (LC-CNT) composite by dispersing low concentration of carboxylic group (-COOH) functionalised multi-walled CNTs (MWCNTs) in liquid-crystal 6CHBT and studied detail alterations thermal electrical parameters. Thermodynamic studies reveal that transition processes are becoming fast due to dispersion MWCNTs. The change behaviour transitions is credited reduction ionic impurities owing ion trapping characteristic CNTs....

Abstract Electron beam irradiation studies on liquid crystal material 5CB have been carried out at a temperature where the compound exists in isotropic phase. In situ time-resolved spectroscopic characterization was during irradiation. Three different transients were observed 2-μs electron pulse. After about 50 μs, only one transient species found to be present, which has an absorption peak 360 nm. Radiolysed sample exhibits broad ∼400 The dielectric measurements show that even low level of...

A detailed investigation of the thermodynamic, electro-optical and dielectric characteristics racemic mixture an antiferroelectric liquid crystal has been carried out. The material phase sequence I-SmC-SmCA-Cr. Due to mixture, system is achiral but SmCA anticlinic structure. studies show that possesses a wide temperature range (~98.0–86.7°C) SmC (~86.7–8.0°C) phases. switching parameters are determined in by polarisation reversal method. Effective macroscopic saturation polarisation, time,...

A liquid crystal-sensing platform, leveraging N -dodecylamine-di-thiocarbamate (DDC), enables simple, sensitive, real-time and cost-effective detection of mercury in drinking water, aiding environmental pollution control.