Functionalized and non-functionalized multi walled carbon nanotubes in the anisotropic media of liquid crystalline material

Singh, Praveen Kumar; Dubey, Prashant; Dhar, Ravindra; Dąbrowski, R.

doi:10.1016/j.molliq.2022.120889

Cited by 13 publications

(2 citation statements)

References 65 publications

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“…Alternatively, better exploitation of liquid crystalline behavior for demanding applications needs an understanding of ionic phenomena in LCs doped with nanomaterials 20 , 21 and identification of processes that lead to the purification of LCs with optimal values of nanomaterials 14 , 15 , 22 , 23 . Considering the attempts leading to optimization of LC properties in some fields by functionalizing nanoparticles 11 , 24 , 25 , purification along with conductivity improvement requires using low concentrations of nanomaterials in LCs. Hence, nanomaterials need to be surface-treated differently 26 for tuning their effective role within LCs.…”

Section: Introductionmentioning

confidence: 99%

Enhancement in electrical conductivity of liquid crystals by graphene metal oxide composites

Khodaee

Dalir

Feghhi

et al. 2023

Sci Rep

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Enhancing the electrical conductivity of liquid crystal (LC) circumvents challenges for application in advanced electronic components. Toward this, using additives made of different nanostructures that could result in functional LCs is suggested. In this paper, various concentrations of graphene (Gr)/metal-oxide (Fe3O4) nanocomposite (GMN) (0.0001–1 w%) were added to E7 nematic LC. We found that the role of anisotropic Gr flakes, their edges as well as surface-decorated-metal-oxide-additives have significant impact on electrical properties of E7. A range of appropriate additives of such a nanocomposite enhances the electrical conductivity of LCs. This effect can be traced through the decrease in the formation of GMN aggregates in the E7 and increase in the electrostatic field at the edges of the Gr sheets. Moreover, the presence of metal-oxide nanoclusters due to the presence of oxygen vacancies and defects facilitates the construction of conductive network for improving the charge transfer pathways and contributes to a stronger interaction of the Gr surface with charged species. These factors can provide Gr layers as dipole moments and lead to signal propagation in the dielectric medium. Our finding conveys a pathway toward significant enhancement of electrical conductivity in the LC family which can be useful for functional applications.

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Section: Introductionmentioning

confidence: 99%

Enhancement in electrical conductivity of liquid crystals by graphene metal oxide composites

Khodaee

Dalir

Feghhi

et al. 2023

Sci Rep

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show abstract

“…From both academic and industrial points of view, it is crucial to study electrical properties of such materials. Research results obtained by independent teams during the last two decades point to very non-trivial ionic effects in liquid crystals doped with nanoparticles of different origins (ferroelectric [62][63][64][65][66][67][68][69][70], magnetic [52,[71][72][73][74][75][76][77][78], semiconductor and dielectric [79][80][81][82][83][84][85][86][87], carbon-based [88][89][90][91][92][93][94][95][96][97][98], and metal [99][100][101][102][103][104][105][106], additional references can be found in recent topical reviews [31,…”

Section: Introductionmentioning

confidence: 99%

Eliminating Ambiguities in Electrical Measurements of Advanced Liquid Crystal Materials

2023

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Existing and future display and non-display applications of thermotropic liquid crystals rely on the development of new mesogenic materials. Electrical measurements of such materials determine their suitability for a specific application. In the case of molecular liquid crystals, their direct current (DC) electrical conductivity is caused by inorganic and/or organic ions typically present in small quantities even in highly purified materials. Important information about ions in liquid crystals can be obtained by measuring their DC electrical conductivity. Available experimental reports indicate that evaluation of the DC electrical conductivity of liquid crystals is a very non-trivial task as there are many ambiguities. In this paper, we discuss how to eliminate ambiguities in electrical measurements of liquid crystals by considering interactions between ions and substrates of a liquid crystal cell. In addition, we analyze factors affecting a proper evaluation of DC electrical conductivity of advanced multifunctional materials composed of liquid crystals and nanoparticles.

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Conductivity and optical bandgap parameters variations of methyl red-doped 4-pentyl-4′-cyanobiphenyl nematic liquid crystal: norland optical adhesive 65 photopolymer composites

Kocakülah

Köysal

2023

J Mater Sci: Mater Electron

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Functionalized and non-functionalized multi walled carbon nanotubes in the anisotropic media of liquid crystalline material

Cited by 13 publications

References 65 publications

Enhancement in electrical conductivity of liquid crystals by graphene metal oxide composites

Enhancement in electrical conductivity of liquid crystals by graphene metal oxide composites

Eliminating Ambiguities in Electrical Measurements of Advanced Liquid Crystal Materials

Conductivity and optical bandgap parameters variations of methyl red-doped 4-pentyl-4′-cyanobiphenyl nematic liquid crystal: norland optical adhesive 65 photopolymer composites

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