Photodielectric Properties of C<sub>60</sub>Solution in the Ferroelectric Liquid Crystal

Koval’chuk, A. V.; Koval'chuk, T. N.

doi:10.1080/15421400802451865

Cited by 4 publications

(2 citation statements)

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“…Fig. 1 are the frequency dependences of real ε′ (curves 1, 3) and imaginary ε″ (2, 4) components of the complex dielectric permittivity for the planar oriented NLC (1, 2) and Е25М+3 wt.% С60D (3,4). All the measurements have been carried out at the temperature 298 K. The obtained spectra can be separated by two parts A and B.…”

Section: Methodsmentioning

confidence: 99%

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Dielectric and electro-optical properties of solutions of chemically modified fullerene С60 in nematic liquid crystal

Vovk¹,

Lashkaryov²

2011

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. Solutions of fullerene molecules С60 with chemically attached molecules of diamine (С60D) in planar oriented nematic liquid crystal (NLC) were obtained by only heating and ultrasonic processing. The С60D concentration changes from 0 up to 3.0 wt.%. Within the ranges of frequencies 10 -1 -10 6 Hz and temperatures 298-343 K, dielectric properties of solutions were investigated. It was shown that, at frequencies higher than 100 Hz, the frequency dispersion of the components of complex dielectric permittivity is absent. A value of conductivity of the solution was determined. It was also shown that the activation energy for the temperature dependence of the conductivity in nematic and isotropic phases does not depend on the concentration of molecules С60D. Obtained and explained were the reasons of the nonmonotonic conductivity dependence of solutions on the concentration of С60D molecules. For frequencies lower than 100 Hz, the dispersion of the components of complex dielectric permittivity is observed. It was shown that the dispersion can be described by the Debye equation. The temperature dependence of a value inverse to the relaxation time correlates with the temperature dependence of conductivity. Presence of С60D molecules in NLC tends to increasing the voltage for the Frederiksz transition. Made was the assumption that this effect may be explained by increase in viscosity of NLC as a consequence of aggregation of fullerene molecules.

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Section: Methodsmentioning

confidence: 99%

“…We showed earlier [4] that presence of 3 wt.% С60D in ferroelectric LC results in disappearance of ferroelectric properties. In this case, all the phases and temperatures of transitions between them were not changed.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and electro-optical properties of solutions of chemically modified fullerene С60 in nematic liquid crystal

Vovk¹,

Lashkaryov²

2011

Semicond. Phys. Quantum Electron. Optoelectron.

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Laser-induced persistent photo-dielectric effects in Se–Te–Sn–Cd chalcogenide glassy semiconductors (STSC ChGs)

Kumar

Mehta

2018

J. Mater. Chem. C

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Suppression of Surface Domains in Ferroelectric Liquid Crystals by Dye Dispersion

et al. 2014

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Photodielectric Properties of C₆₀Solution in the Ferroelectric Liquid Crystal

Cited by 4 publications

References 9 publications

Dielectric and electro-optical properties of solutions of chemically modified fullerene С60 in nematic liquid crystal

Dielectric and electro-optical properties of solutions of chemically modified fullerene С60 in nematic liquid crystal

Laser-induced persistent photo-dielectric effects in Se–Te–Sn–Cd chalcogenide glassy semiconductors (STSC ChGs)

Suppression of Surface Domains in Ferroelectric Liquid Crystals by Dye Dispersion

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Photodielectric Properties of C60Solution in the Ferroelectric Liquid Crystal

Cited by 4 publications

References 9 publications

Dielectric and electro-optical properties of solutions of chemically modified fullerene С60 in nematic liquid crystal

Dielectric and electro-optical properties of solutions of chemically modified fullerene С60 in nematic liquid crystal

Laser-induced persistent photo-dielectric effects in Se–Te–Sn–Cd chalcogenide glassy semiconductors (STSC ChGs)

Suppression of Surface Domains in Ferroelectric Liquid Crystals by Dye Dispersion

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Photodielectric Properties of C₆₀Solution in the Ferroelectric Liquid Crystal