Optical properties of permanent gratings in liquid crystal doped with dye and carbon nanotube

Suleiman, Y. S.; Ghosh, Sharmistha; Abbasov, Mikail E.; Carlisle, G.O.

doi:10.1007/s10854-007-9416-0

Cited by 16 publications

(8 citation statements)

References 29 publications

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“…The effects of SWCNTs (0.002 wt%) on diffraction efficiency in the azo dye MR-doped LC (E7) were studied [194][195][196]. An order parameter of s LC = 0.605 was estimated using polarized absorption measurements.…”

Section: Related Effectsmentioning

confidence: 99%

“…It was shown that the presence of CNTs enhanced the diffraction efficiency by a factor of 1.8. Permanent gratings were written in planar nematic LC cells containing hybrid mixture MR + E7 + SWCNTs [195]. The grating formation was caused by trans-cis photo-isomerisation of the dye molecules, followed by surface adsorption of the cisisomer [196].…”

Section: Related Effectsmentioning

confidence: 99%

See 1 more Smart Citation

Carbon Nanotubes in Liquid Crystals: Fundamental Properties and Applications

Lisetski

Soskin

Lebovka

2015

Springer Proceedings in Physics

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The structure and properties of liquid crystalline suspensions filled by carbon nanotubes (CNTs) are critically reviewed. Special attention is paid to interactions between CNTs and molecules of the liquid crystals (LC), which lead to formation of ordered supramolecular structures. These structures, in turn, determine unique physical properties of LC + CNT suspensions, including electrical conductivity, dielectric permittivity, phase transitions, optical transmission, memory effects that can be used in electrooptic and optoelectronic devices, etc. Great variety of LC phases are considered as a host media, such as nematics, cholesterics, smectics of different types (including ferroelectrics), lyotropic, chromonic, ionic and hydrogen-bonded liquid crystals. Alongside multi-and single-walled carbon nanotubes, the suspensions can also contain the platelets of organoclays used for facilitation of CNT dispersing. Recent practical applications of LC + CNT suspensions and nanomaterials based thereon are also outlined.

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Section: Related Effectsmentioning

confidence: 99%

Section: Related Effectsmentioning

confidence: 99%

Carbon Nanotubes in Liquid Crystals: Fundamental Properties and Applications

Lisetski

Soskin

Lebovka

2015

Springer Proceedings in Physics

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“…Moreover, birefringence enhancement is of primary importance for the innovation of different electro-optic applications [5,6]. Various studies have been done to study the effects of dye, C 60 , polymer, carbon nanotube (CNT) and their combinations on liquid crystal properties [7][8][9][10][11][12][13][14][15][16]. Our group has also reported the effect of dye and nano particles on the dielectric and optical properties of nematic liquid crystals [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Optical Studies of a Pure and Dye Doped Nematic Liquid Crystal E-24

Chandel¹,

Manohar²,

Shukla³

et al. 2012

Transactions on Electrical and Electronic Materials

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The present paper reports the comparative optical behavior of a pure nematic mixture E-24 and its anthraquinone dye doped sample. The variation in the ordinary and extraordinary refractive index (n o , n e ) of the pure and dye doped samples with temperature has been discussed and it has been found that doped sample have a less refractive index compared to the pure sample. The variation in the order parameter for pure and doped samples with temperature has been discussed and it has been seen that the doped sample has a higher order parameter; the possible reasons have been discussed. The variations in birefringence and optical transmittance have also been presented here.

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“…While azo dyes are usually characterized with high values of solubility and order parameter, anthraquinone dyes are attractive because of their high chemical, photo and electrochemical stabilities (4). In recent years, some dyes such as methyl red have begun to be preferred to increase the diffraction efficiency (5,6).…”

Section: Introductionmentioning

confidence: 99%

“…In addition to dyes, optical properties of nematic LCs also can be inhanced by doping with a small amount of carbon nanoparticles (6)(7)(8)(9). Carbon nanotubes are unique nanoscale objects representing π -conjugated molecules.…”

Section: Introductionmentioning

confidence: 99%

Alignment and Reorientation in Nematic Liquid Crystals Doped with Red Dye and Carbon Nanotube

Kaya

Akkurt

Alicilar

2011

Fullerenes, Nanotubes and Carbon Nanostructures

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Four different dyes (Methyl red, Disperse red 1, 13 and 60) were separately doped to each of four different nematic liquid crystals (E7, E8, E63 and ZLI-1132). Their solubilities, textures, phase transition temperatures and order parameters were determined. At the second stage, single-walled nanotubes in a small amount were separately added to each of these solutions, and the experiments were repeated as similar to previous ones. The solubility of dyes was sufficient for using in experiments. When adding dyes and nanotubes, an appreciable change in textures of liquid crystals was not observed. The phase transition temperatures stayed within the limitations required. The changes observed in order parameters depending on the voltage were very small. The highest value of order parameter (0.77) was attained when co-using red 60 dye and nanotube as dopants in the liquid crystal E63.

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Optical properties of permanent gratings in liquid crystal doped with dye and carbon nanotube

Cited by 16 publications

References 29 publications

Carbon Nanotubes in Liquid Crystals: Fundamental Properties and Applications

Carbon Nanotubes in Liquid Crystals: Fundamental Properties and Applications

Optical Studies of a Pure and Dye Doped Nematic Liquid Crystal E-24

Alignment and Reorientation in Nematic Liquid Crystals Doped with Red Dye and Carbon Nanotube

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