Improved Electro-Optical Response of Induced Chiral Nematic Liquid Crystal Doped with Multi-Walled Carbon Nanotubes

Middha, Manju; Kumar, Rishi; Raina, K. K.

doi:10.1080/00150193.2016.1136765

Cited by 10 publications

(4 citation statements)

References 35 publications

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“…Middha et al doped cholesteric liquid crystal ZLI–4151 + CB15 using MWCNTs (ca. 110–170 nm, length 5–9 μm, 0.01, 0.1, 0.5, 1.0 wt.%) and obtained materials with shorter helix pitches [ 86 ]. Due to hardware limitations, we were unable to determine the helix pitch in the N* phase.…”

Section: Resultsmentioning

confidence: 99%

Modifications of FLC Physical Properties through Doping with Fe2O3 Nanoparticles (Part I)

et al. 2021

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The aim of this paper is to show, by systematic studies, the influence of γ-Fe2O3 nanoparticles on the physical parameters of the liquid crystalline matrix, exhibiting a ferroelectric phase in a wide temperature range. The detailed research was carried out by using diffraction (PXRD), microscopic (OM, SEM, FCPM, POM), thermal (DSC), optical (TLI), electric and spectroscopic (FTIR) methods. We show that even the smallest concentration of γ-Fe2O3 nanoparticles largely modifies the parameters of the ferroelectric SmC* phase, such as spontaneous polarization, switching time, tilt angle, rotational viscosity, dispersion anchoring energy coefficient and helix pitch. The admixture also causes a significant reduction in the temperature of phase transitions, broadening the SmA* phase at the expense of the SmC* phase and strong streaking of the texture. We present and explain the non-monotonic modification of these parameters with an increase in the nanoparticle concentration. The influence of oleic acid admixture on these parameters is also widely discussed. We have shown that certain parameters of organic-metal nanocomposites can be controlled by the appropriate amount of metal admixture.

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Section: Resultsmentioning

confidence: 99%

Modifications of FLC Physical Properties through Doping with Fe2O3 Nanoparticles (Part I)

et al. 2021

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“…13) and with the effects of nanotubes the physical properties of the LC matrix will be greatly improved. 34,36,37,41,[82][83][84][85][86][87][88][89][90][91] When an external electric eld is applied, LC molecules with positive dielectric anisotropy will tend to align along the eld and then prompt CNTs to reorient accordingly via the director eld or the dipolar interaction. As a result, the doped nanotubes will inuence the elastic constant and dielectric properties of the LC-CNT dispersion by the experiment.…”

Section: Cnts As Guests In Lc Layersmentioning

confidence: 99%

“…Firstly, the threshold voltage will be reduced with the increase of the concentration of CNTs for several reasons. 33,37,40,41,[90][91][92][93][94][95][96] One of them is the enhanced dielectric anisotropy of the LC-CNT dispersion. Another is the reduced screen effect caused by reduced ion charges within the cells.…”

Section: Cnts As Guests In Lc Layersmentioning

confidence: 99%

Liquid crystallinity of carbon nanotubes

et al. 2018

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“…The various memory effects considered promising for electro-optical applications have been reported [172], with various subsequent developments [173,174]. Further efforts showed the ways for various CLC-based materials, where doping with CNT allowed temperature-and irradiation-induced writing and erasing effects [175].…”

Section: Cholesteric Liquid Crystalsmentioning

confidence: 99%

Effects of Dispersed Carbon Nanotubes and Emerging Supramolecular Structures on Phase Transitions in Liquid Crystals: Physico-Chemical Aspects

Lisetski

Bulavin

Lebovka

2023

Liquids

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The current state of the study of different liquid crystalline (LC) systems doped with carbon nanotubes (CNTs) is discussed. An attempt is endeavored to outline the state-of-the-art technology that has emerged after two past decades. Systematization and analysis are presented for the integration of single- and multi-walled carbon nanotubes in thermotropic (nematic, smectic, cholesteric, ferroelectric, etc.) and lyotropic LCs. Special attention is paid to the effects of alignment and supramolecular organization resulting from orientational coupling between CNTs and the LC matrix. The effects of the specific inter-molecular and inter-particle interactions and intriguing microstructural, electromagnetic, percolation, optical, and electro-optical properties are also discussed.

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Improved Electro-Optical Response of Induced Chiral Nematic Liquid Crystal Doped with Multi-Walled Carbon Nanotubes

Cited by 10 publications

References 35 publications

Modifications of FLC Physical Properties through Doping with Fe2O3 Nanoparticles (Part I)

Modifications of FLC Physical Properties through Doping with Fe2O3 Nanoparticles (Part I)

Liquid crystallinity of carbon nanotubes

Effects of Dispersed Carbon Nanotubes and Emerging Supramolecular Structures on Phase Transitions in Liquid Crystals: Physico-Chemical Aspects

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