Microstructure and electrical conductivity of hybrid liquid crystalline composites including 5CB, carbon nanotubes and clay platelets

Lebovka, Nikolaï; Goncharuk, A. I.; Bezrodna, T.; Chashechnikova, I. T.; Nesprava, V.

doi:10.1080/02678292.2012.660201

Cited by 11 publications

(6 citation statements)

References 42 publications

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“…Very interesting electrical behavior was found in liquid crystal systems doped with montmorillonite platelets [211][212][213][214][215][216][217]. Montmorillonite is a type of smectic clays characterized by a sandwich "tetrahedral-octahedral-tetrahedral" structure made of aluminosilicate lamellar materials.…”

Section: Flcmentioning

confidence: 99%

“…Higher concentrations of montmorillonite in nematic liquid crystals (up to 5 wt. %) result in the percolation phenomena and an increase of electrical conductivity [216,217].…”

Section: Flcmentioning

confidence: 99%

“…Conducting nanofiber NLC Increase in the conductivity [208,209] Polymeric nanoparticles FLC Decrease in dielectric losses [210] Nanoclay (montmorillonite) NLC Ion trapping, time dependent properties, and aggregation [211][212][213][214][215][216][217] x x S ZnO …”

Section: Refmentioning

confidence: 99%

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Nano-Objects and Ions in Liquid Crystals: Ion Trapping Effect and Related Phenomena

2015

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Abstract:The presence of ions in liquid crystals is one of the grand challenges that hinder the application of liquid crystals in various devices, which include advanced 3-D and flexible displays, tunable lenses, etc. Not only do they compromise the overall performance of liquid crystal devices, ions are also responsible for slow response, image sticking, and image flickering, as well as many other negative effects. Even highly purified liquid crystal materials can get contaminated during the manufacturing process. Moreover, liquid crystals can degrade over time and generate ions. All of these factors raise the bar for their quality control, and increase the manufacturing cost of liquid crystal products. A decade of dedicated research has paved the way to the solution of the issues mentioned above through merging liquid crystals and nanotechnology. Nano-objects (guests) that are embedded in the liquid crystals (hosts) can trap ions, which decreases the ion concentration and electrical conductivity, and improves the electro-optical response of the host. In this paper, we (i) review recently published works reporting the effects of nanoscale dopants on the electrical properties of liquid crystals; and (ii) identify the most promising inorganic and organic nanomaterials suitable to capture ions in liquid crystals.

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Section: Flcmentioning

confidence: 99%

“…Higher concentrations of montmorillonite in nematic liquid crystals (up to 5 wt. %) result in the percolation phenomena and an increase of electrical conductivity [216,217].…”

Section: Flcmentioning

confidence: 99%

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Nano-Objects and Ions in Liquid Crystals: Ion Trapping Effect and Related Phenomena

2015

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“…According to [44], the dissolved water dissociates and promotes dissociation of other impurities that is a main factor of increasing of ionic conductivity. The other factor could be the charge migration along the surface of the network of LapO particles, which may be quite essential at LapO concentration of 0.1 wt.% [30].…”

Section: Dielectric Propertiesmentioning

confidence: 99%

“…Previously, we tried to achieve this by doping the LC+CNT suspensions with organically modified particles of natural clays (montmorillonite (MMT)). However, the results appeared quite ambiguous and highly dependent on the origin of the clay minerals [30]. In the present research, we apply a synthetic clay Laponite (Lap) as a stabilizing agent, mainly because of two reasons.…”

Section: Introductionmentioning

confidence: 99%