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Effect of fullerenes C 60 on dielectric relaxation, electric conductivity, and electro-optic properties of 4-cyano-4′-pentylbiphenyl

2020; Taylor & Francis; Volume: 29; Issue: 6 Linguagem: Inglês

10.1080/1536383x.2020.1859489

1536-4046

T. D. Ibragimov,

Nonlinear Optical Materials Studies

Effect of fullerenes C60 on dielectric relaxation, electric conductivity, and electro-optic properties of nematic liquid crystal 4-cyano-4′-pentylbiphenyl is investigated. It is shown that the inclusion of fullerenes into liquid crystal leads to decreasing of the clearing temperature and the order parameter. In this case, the transverse component of the real part of dielectric permittivity increases while the longitudinal component decreases. A maximum of dielectric absorption shifts to the low-frequency region. The capture of moving ions by fullerenes leads to a decrease of electric conductivity. The elastic constant, rotational viscosity and switching times decrease while the threshold voltage of Freedericksz effect increases.