Change in Dielectric and Electro-Optical Properties of a Nematic Material (6CHBT) Due to the Dispersion of BaTiO₃Nanoparticles

Saturation effect for dependence of the electrical conductivity of planar oriented nematic liquid crystal 6CB on the concentration of Cu7PS6 nanoparticles

“…The dielectric properties of the obtained sandwich cells were investigated within the frequency range 10…10 6 Hz at the temperature 293 K using the oscilloscopic method [16]. The amplitude of the measuring signal of the sinusoidal shape was 0.2 V. Assuming that the equivalent scheme of the measuring cell is a parallel connected resistance and a capacitor, the values of the resistance R and the capacitance C of the samples at different frequencies were determined, and on the basis of these values and geometric cell sizes, the imaginary (ε") and real (ε') components of the complex dielectric permittivity were determined.…”

“…As it follows from the analysis of works [1][2][3][4][5][6][7][8], among these nanoparticles, the ferroelectric ones are the most promising for modification of the functional possibilities of LC. We believe that also nanoparticles of superionic conductors with a structure of argyrodite can significantly expand the functional properties of LC.…”

Influence of superionic nanoparticles Cu6PS5I on dielectric properties of nematic liquid crystal 6СНВТ

“…Almost 3-fold increase in anisotropy of the permittivity after introduction of BaTiO 3 was obtained in the paper [3]. It was shown that this introduction into nematic LC leads to manifestation of the electromechanical memory effect in the isotropic phase [4] and to reduction of the Fredericks threshold [5] as well as to changes in thermodynamic and dielectric properties of LC [6]. In the paper [7], it was found that after introducing the ferroelectric nanoparticles into nematic LC, elasticity constants of LC are reduced, while the permittivity and rotational viscosity of LC are increased.…”

“…The analysis of publications shows that a lot of studies with using different types of nanoparticles are already performed. The most promising direction to modify functionalities of LC is ferroelectric nanoparticles [1][2][3][4][5][6][7]. One of the features of these nanoparticles is the presence of a strong local electric field.…”

Dielectric and Electro-Optical Properties of Ceramic Nanoparticles Doped Liquid Crystals

“…Thus, doping anatase nanoparticles into LC was found to be a potentially cost-effective and simple method to improve the device performance. Saurabh N. Paul et al dispersed a low concentration (0.5 wt %) of ferroelectric nano-powder of barium titanate (BaTiO 3 ) in 4-(trans-4-n-hexylcyclohexyl) nematic liquid crystal othiocyanatobenzoate (6CHBT) [42]. The temperature and frequency dependent relative dielectric permittivity and loss were investigated and relaxation frequency and activation energy of an observed relaxation mechanism along with the electro-optical parameters such as threshold voltage, switching voltage of the pure as well as nano system dispersed with LC.…”