Orientational control of liquid crystal molecules via carbon nanotubes and dichroic dye in polymer dispersed liquid crystal

Kumar, Pankaj; Sharma, Vandna; Jaggi, Chinky; Malik, Praveen; Raina, K. K.

doi:10.1080/02678292.2016.1247476

Cited by 66 publications

(16 citation statements)

References 62 publications

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“…53 It is the role of the aromatic systems in LC-CNT mixtures that play in the behavior of dispersing and aligning. 53,54 On the other hand, CNTs, viewed as highly anisometric rigid rod-like particles, can be manipulated by electric or magnetic elds due to the dielectric and magnetic anisotropy, which is the basis for their use in modern display devices. [55][56][57][58] For all of these reasons, the interest in liquid crystallinity of CNTs is quite active.…”

Section: Introductionmentioning

confidence: 99%

Liquid crystallinity of carbon nanotubes

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Liquid crystallinity of carbon nanotubes

et al. 2018

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“…D-PDLCs have been studied extensively by several groups, and it has been found that a strong microscopic mutual interaction among the dye and LC molecules influenced the LC refractive index, dielectric constant, orientational order and phase transition temperature [ 88 , 89 , 90 , 91 , 92 ]. E-O properties of the films were significantly improved by doping dyes due to their contribution to modifying the morphology of the PDLCs [ 93 , 94 , 95 , 96 ].…”

Section: Preparation Of Dye-doped Pdlc Composite Filmmentioning

confidence: 99%

Recent Advances in The Polymer Dispersed Liquid Crystal Composite and Its Applications

et al. 2020

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Polymer dispersed liquid crystals (PDLCs) have kindled a spark of interest because of their unique characteristic of electrically controlled switching. However, some issues including high operating voltage, low contrast ratio and poor mechanical properties are hindering their practical applications. To overcome these drawbacks, some measures were taken such as molecular structure optimization of the monomers and liquid crystals, modification of PDLC and doping of nanoparticles and dyes. This review aims at detailing the recent advances in the process, preparations and applications of PDLCs over the past six years.

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“…In our recent reported work, the dopants such as carbon nanotube, azo and anthra dyes are employed to enhance the EO properties of normal mode PDLCs . These dyes have good optical and alignment properties as well as high solubility in LC hosts, which resulted in LC devices of higher CRs with reduced applied fields.…”

Section: Introductionmentioning

confidence: 99%

Preparation and electrooptic study of reverse mode polymer dispersed liquid crystal: Performance augmentation with the doping of nanoparticles and dichroic dye

Sharma

Kumar

Chinky

et al. 2019

J of Applied Polymer Sci

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Reported herein, the preparation, morphological, and electrooptic (EO) characterization of reverse mode polymer dispersed liquid crystals (PDLCs) with nematic liquid crystal (LC) and UV curable polymer optical adhesive using polymerization induced phase separation method. The PDLCs are switchable between transparent and opaque states due to the homeotropic and planar alignment of LC in their OFF and ON states of applied voltage, respectively. Further, effect of doping of a fixed concentration of azo dye and silica nanoparticles (NPs) on morphological, EO and response characteristics of same PDLC sample was also analyzed. Experimental results showed that doped reverse mode PDLCs have the higher OFF state optical transmission and boost up in the scattering ON state compared with pristine reverse mode PDLC. The phenomenon is also supported by extinction coefficient and absorption study based on Beer's law. The threshold and operating voltages were found reduced ~1.56 and ~1.73 times for NPs and (NPs + dye) doped reverse mode PDLCs, respectively, along with better contrasts to the pristine reverse mode PDLC. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48745.

show abstract

Orientational control of liquid crystal molecules via carbon nanotubes and dichroic dye in polymer dispersed liquid crystal

Cited by 66 publications

References 62 publications

Liquid crystallinity of carbon nanotubes

Liquid crystallinity of carbon nanotubes

Recent Advances in The Polymer Dispersed Liquid Crystal Composite and Its Applications

Preparation and electrooptic study of reverse mode polymer dispersed liquid crystal: Performance augmentation with the doping of nanoparticles and dichroic dye

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