Enhanced two-beam coupling in colloids of ferroelectric nanoparticles in liquid crystals

Buchnev, Oleksandr; Dyadyusha, A.; Kaczmarek, Malgosia; Reshetnyak, Victor; Reznikov, Yuriy

doi:10.1364/josab.24.001512

Cited by 102 publications

(56 citation statements)

References 28 publications

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“…5,6 Another example of hybrid materials are the suspensions of ferroelectric nanoparticles 7 in nematic liquid crystals. Liquid crystals functionalized in this way show increased phase transition temperatures as well as dielectric and optical anisotropy 8 and have potential applications in, for example, displays 9 as well as for photorefractive systems. 10 In this study, we explored the impact of nanoparticles on liquid crystals most suitable for optoelectronic applications, namely, low refractive index liquid crystals.…”

Section: Ferroelectric Nanoparticles In Low Refractive Index Liquid Cmentioning

confidence: 99%

Ferroelectric nanoparticles in low refractive index liquid crystals for strong electro-optic response

Kaczmarek

Buchnev

Nandhakumar

2008

Applied Physics Letters

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Functional materials based on ferroelectric, inorganic nanoparticles, and low refractive index nematic liquid crystals show strong induced birefringence and dielectric anisotropy. Birefringence can increase by a factor of 2 and dielectric anisotropy by a factor of 3 as compared with nominally pure liquid crystals. The enhancement of the electro-optic performance is higher in liquid crystals with Sn2P2S6 (SPS) nanoparticles than with BaTiO3 nanoparticles. The shape and size distribution of both types of ferroelectric particles were characterized using atomic force microscopy. The average size of SPS nanoparticles was 45nm and of BaTiO3 nanoparticles was 20nm.

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Section: Ferroelectric Nanoparticles In Low Refractive Index Liquid Cmentioning

confidence: 99%

Ferroelectric nanoparticles in low refractive index liquid crystals for strong electro-optic response

Kaczmarek

Buchnev

Nandhakumar

2008

Applied Physics Letters

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“…Suspensions of different NPs in various nematic LCs have been investigated by many authors. In particular, nematics doped with ferroelectric NPs enhance dielectric and optical anisotropy, increase the electro-optic response [6,7] and improve the photorefractive properties of LC composites [8]. Nematic suspensions of paraand ferromagnetic particles are promising candidates for magnetically tunable structures, and doping of ferroelectric LCs with metal and silica NPs can improve spontaneous polarization and dielectric permittivity, as well as decrease the switching times [9,10].…”

Section: Introductionmentioning

confidence: 99%

Effect of nanoparticle chain formation on dielectric anisotropy of nematic composites

Osipov

Gorkunov

2015

Phys. Rev. E

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This version is available at https://strathprints.strath.ac.uk/55300/ Strathprints is designed to allow users to access the research output of the University of Strathclyde. Unless otherwise explicitly stated on the manuscript, Copyright © and Moral Rights for the papers on this site are retained by the individual authors and/or other copyright owners. Please check the manuscript for details of any other licences that may have been applied. You may not engage in further distribution of the material for any profitmaking activities or any commercial gain. You may freely distribute both the url (https://strathprints.strath.ac.uk/) and the content of this paper for research or private study, educational, or not-for-profit purposes without prior permission or charge.Any correspondence concerning this service should be sent to the Strathprints administrator: strathprints@strath.ac.ukThe Strathprints institutional repository (https://strathprints.strath.ac.uk) is a digital archive of University of Strathclyde research outputs. It has been developed to disseminate open access research outputs, expose data about those outputs, and enable the management and persistent access to Strathclyde's intellectual output. A general theory of the dielectric constant of nematic liquid crystal mixtures is presented including the particular case of nematics doped with polar nanoparticles. The results are used to estimate the contribution of chains of polar nanoparticles to the static dielectric anisotropy and birefringence of the nematic composite taking into account contributions from chains of different lengths. The dependence of the dielectric anisotropy on the dipolar interaction strength is considered in detail and it is shown that formation of polar chains of nano-particles enables one to explain a significant increase of the dielectric constant of the composite as observed experimentally.

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“…So far the subjects have included various kinds of materials such as metallic Ag-or Pd-nanoparticles [1,2], CNTs [3,4,[11][12][13], diamond particles [14], semiconductive nanotubes [15], cage-like polymeric molecules such as polyhedral oligomeric silsesquioxanes (POSS) [16,17], and ferroelectric particles [5,18]. By using these nanoparticle candidates, newly found texture, switching behavior, or enhanced electro-optical response for the modified LC can be achieved.…”

Section: Introductionmentioning

confidence: 99%

Effects of Nanoscaled Tin-Doped Indium Oxide on Liquid Crystals against Electrostatic Discharge

et al. 2013

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In our studies, it was confirmed that the cause of image sticking on liquid crystal (LC) cells is based on attacks of electrostatic discharge (ESD), which can be greatly relieved by doping with a small amount of tin-doped indium oxide (ITO) nanoparticles. Our proposed remedy allows the residual time of image sticking to be significantly reduced by more than an order and may protect the LC displays against any adverse ESD conditions, thus enhancing the overall display quality and reliability. In this study, conventional voltage-transmittance (V-T) characterization, voltage holding ratio (VHR) measurement, and ESD testing were employed to investigate the properties of the ITO-doped LCs. Based on our low voltage measurement results, it is interesting to find that ITO nanoparticles do not evidently alter the intrinsic properties of the LC. Namely, ITO additive initiates an early breakdown of the doped LC samples exposed to high electric fields. A model is proposed in this paper to depict the possible role of ITO particles applied in LCs. OPEN ACCESSCrystals 2013, 3 531

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Enhanced two-beam coupling in colloids of ferroelectric nanoparticles in liquid crystals

Cited by 102 publications

References 28 publications

Ferroelectric nanoparticles in low refractive index liquid crystals for strong electro-optic response

Ferroelectric nanoparticles in low refractive index liquid crystals for strong electro-optic response

Effect of nanoparticle chain formation on dielectric anisotropy of nematic composites

Effects of Nanoscaled Tin-Doped Indium Oxide on Liquid Crystals against Electrostatic Discharge

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