Dielectric and electro-optical properties of dye doped ferroelectric liquid crystal

Srivastava, Abhishek Kumar; Misra, Abhishek Kumar; Shukla, J. P.; Manohar, Rajiv

doi:10.1016/j.physleta.2008.07.078

Cited by 24 publications

(20 citation statements)

References 13 publications

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“…The generated electric field would be localized but it would have some effect on the polarization though it will be a feeble one. Thus, the value of average dielectric permittivity decreases with increase in the concentration of the dopant [10,14,20].…”

Section: Resultsmentioning

confidence: 98%

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Effects of polymer doping on dielectric and electro-optical parameters of nematic liquid crystal

et al. 2014

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Poly(isobutyl methacrylate) (PiBMA) polymer doped in pure p‐Ethoxybenzylidene p‐Heptylaniline (EBHA) mesomaterial has been investigated in the present study. The dielectric and electro‐optical parameters of EBHA having nematic phase were altered due to the addition of polymer in different concentration. The strong dopant concentration dependent nature of negative dielectric anisotropy and conductivity are the interesting results of the present polymer doped nematic liquid crystal (NLC) system. The present composite shows its useful application in low charge consumable devices due to the easy charge transportation phenomenon. The investigated polymer doped‐NLC system exhibiting increased negative dielectric anisotropy and high conductivity may prove to be advantageous for video applications in vertically aligned cells. POLYM. ENG. SCI., 55:414–420, 2015. © 2014 Society of Plastics Engineers

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Section: Resultsmentioning

confidence: 98%

“…This type of behavior that after a particular concentration of non-mesogenic guest molecule showing opposite trend has also been reported by other research groups for different properties. This concentration may be termed as saturation concentration [14,17,21].…”

Section: Resultsmentioning

confidence: 99%

Effects of polymer doping on dielectric and electro-optical parameters of nematic liquid crystal

et al. 2014

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“…(1). The experimental data have been fitted in these equations and they have been corrected for low and high frequency values [12].…”

Section: Dielectric Permittivity Studymentioning

confidence: 99%

“…The dielectric and electro-optical properties of FLCs such as dielectric permittivity, spontaneous polarization, contrast ratio, switching characteristics make them an excellent material for display purpose. Doping of different dyes and nanoparticles in the FLC has been attempted for their better performance in display devices and other applications [8][9][10][11][12]. Recent work on dielectric studies on CNT doped FLC system has shown a great increase in the dielectric permittivity, loss and relaxation strength as compared to the pure FLC system [13].…”

Section: Introductionmentioning

confidence: 99%

Modification in dielectric properties of SWCNT doped ferroelectric liquid crystals

Gupta

Kumar

Srivastava

et al. 2011

Journal of Non-Crystalline Solids

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“…The dispersion of dye molecules in FLC has been found to change many physical properties of FLCs, which depend upon the dye molecular structure and its concentration. 10 In a fullerene and FLC composite, illumination by the focused light of a halogen lamp alters the complex permittivity in a low frequency range due to the formation of additional electron exchange channels between ions and electrodes through fullerene. 11 The doping of different size and concentration of CdS nanorods in FLC and antiferroelectric liquid crystals (AFLC) have increased the spontaneous polarization, response time and photoluminescence properties.…”

Section: Introductionmentioning

confidence: 99%

Dielectric relaxation and electro-optic response in nano-ceria dispersed ferroelectric liquid crystal nanocomposites: effect of structural deformation and lattice straining

Goel

Arora

2015

RSC Adv.

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The current investigations deal with the effect of concentration of CeO 2 nanoparticles (NPs) on physical properties of ferroelectric liquid crystal. Infrared transmission spectroscopy has been used to reveal the mechanism behind significant changes in dielectric behavior and electro-optic parameters of nanocomposites, for the first time, in correlation with structural deformation of functional group present in FLC and lattice straining induced by the NPs. The temperature and frequency dependence of dielectric permittivity exhibits a gradual increase in the dielectric constant with the addition of CeO 2 NPs. An increase in the saturated spontaneous polarization (P s ) and switching at a lower bias was also FLC molecules with an enhancement in the dielectric constant and P s values. In addition, the loss profile demonstrates an increase in the frequency and magnitude of ion linked relaxation and Goldstone mode after ceria dispersion, whereas losses on their lower frequency side decreases.

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Dielectric and electro-optical properties of dye doped ferroelectric liquid crystal

Cited by 24 publications

References 13 publications

Effects of polymer doping on dielectric and electro-optical parameters of nematic liquid crystal

Effects of polymer doping on dielectric and electro-optical parameters of nematic liquid crystal

Modification in dielectric properties of SWCNT doped ferroelectric liquid crystals

Dielectric relaxation and electro-optic response in nano-ceria dispersed ferroelectric liquid crystal nanocomposites: effect of structural deformation and lattice straining

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