Effects of carbon nanosolids on the electro-optical properties of a twisted nematic liquid-crystal host

Lee, Wei; Wang, Chun Yu; Shih, Yu Cheng

doi:10.1063/1.1771799

Cited by 267 publications

(183 citation statements)

References 21 publications

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“…a display. Reported effects include reduced effective ion content 16,18,20,21 , increased dielectric anisotropy 16,17,19 , suppressed backflow effects 16,17 , faster 10 electrooptic response due to reduced rotational viscosity 14 and lower switching threshold 16,17,19 . The CNT concentration was in all these works kept extremely low, yet substantial effects were reported.…”

Section: Cnts In Thermotropic Liquid Crystals 100mentioning

confidence: 99%

Carbon Nanotubes in Liquid Crystals

Lagerwall

Scalia

2014

Handbook of Liquid Crystals

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We review the research on carbon nanotube (CNT) dispersion in liquid crystals (LCs), focusing mainly on the approaches where the aim is to align CNTs along the LC director field, but covering briefly also the proposed possibility to enhance thermotropic LCs by CNT-doping. All relevant LC types are considered: thermotropic LC hosts allowing dynamic CNT realignment, lyotropic LC hosts allowing very high concentration of CNTs uniformly aligned over macroscopic areas and 10 consequent removal of the LC, and LC phases formed by CNTs themselves, used in spinning highquality carbon nanotube fibres. We also discuss the issue of CNT dispersion with some detail, since successful nanotube separation is imperative for success in this field regardless of the type of LC that is considered. We end by defining a few major challenges for the development of the field over the next few years, critical for reaching the stage where industrially viable protocols for LC-15 based CNT alignment can be defined.

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Section: Cnts In Thermotropic Liquid Crystals 100mentioning

confidence: 99%

Carbon Nanotubes in Liquid Crystals

Lagerwall

Scalia

2014

Handbook of Liquid Crystals

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“…A variety of applications has been taken place while the dispersion of metal nanoparticles into the moiety of LC. These nanodoping materials investigated include metallic nanoparticles, semiconducting nanoparticles, ferroelectric nanoparticles, carbon-related nanoparticles and other [6][7][8] . The capping agent helps to prevent the uncontrollable growth of particles; prevent particle aggregation, control growth rate, and particle size 9 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of Thiol - Capped Silver Nanoparticles and Their Effect on Liquid Crystals

Sivaram¹

2017

Rasayan J. Chem.

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Synthesis and characterization of Liquid Crystalline p-n-decyloxy benzoic acid (10OBA) compound with thiolcapped Ag nanoparticle dispersion was carried out by chemical reduction method. The Polarizing Microscopy (POM), Differential Scanning Calorimeter (DSC) technique are used to measure the Glass transition temperature (Tg) and melting temperature (Tm) of the prepared samples. Spectroscopic techniques like X-ray Diffraction spectrometric studies (XRD), Scanning Electron Microscopic studies (SEM), Ultra-Violet Visible (UV) spectroscopy, Fourier Transform Infra Red Spectroscopy (FTIR) were also carried out on to the samples. Textural determinations of the synthesized compounds are recorded by using POM connected with a hot stage and camera. The results showed that the dispersion of thiol-capped Ag nanoparticles in 10OBA exhibited NC phases as that of the pure 10OBA with reduced clearing temperature as expected. The order parameter is estimated from birefringence anisotropy data without considering any internal field model to liquid crystal molecule and with dispersed thiol-capped Ag nanoparticles. It is found that the birefringence anisotropy as well as orientational order parameter of 10OBA increased with dispersed 1 wt% thiol-capped Ag nanoparticles.

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“…14,15 The doping of various nanomaterials in to LCs has enhanced many features of LCs in the form of frequency modulation response, nonvolatile memory effect, faster electro-optical response, low driving voltage and enhanced photoluminescence. [16][17][18][19][20] Now a days, graphene and graphene oxide ͑GO͒ are the interesting nanomaterial for dynamic research studies. GO can be prepared by extensive chemical attacks of graphite crystal to introduce oxygen.…”

Section: Introductionmentioning

confidence: 99%

Effect of graphene oxide nanomaterial in electroclinic liquid crystals

Malik

Choudhary

Silotia

et al. 2010

Journal of Applied Physics

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The collective dielectric relaxation studies have been carried out on the electroclinic liquid crystals ͑ELCs͒ doped with 0.1 to 0.2 wt % of graphene oxide ͑GO͒ in the frequency range of 20 Hz to 1 MHz. The GO favors for a good quality vertical alignment without any surface treatment of the substrates. The coupling of GO with indium tin oxide ͑ITO͒ substrate and ELC materials affects the molecular ordering and supports the ELC molecules to be aligned along the GO attached to the ITO surface in vertical direction. The vertical alignment can be changed to homogeneous by applying a high bias field to the sample and such converted homogeneous cell shows an additional dielectric relaxation peak in the low frequency side of Goldstone mode in SmC ‫ء‬ phase due to presence of GO whereas in the pure material no such peak was observed. The frequency separation of both peaks ͑Goldstone mode and an additional peak͒ increases with temperature and low frequency peak vanishes near transition temperature.

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Effects of carbon nanosolids on the electro-optical properties of a twisted nematic liquid-crystal host

Cited by 267 publications

References 21 publications

Carbon Nanotubes in Liquid Crystals

Carbon Nanotubes in Liquid Crystals

Synthesis and Characterization of Thiol - Capped Silver Nanoparticles and Their Effect on Liquid Crystals

Effect of graphene oxide nanomaterial in electroclinic liquid crystals

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