2020   03   en   p.03-06 T.D. Ibragimov, A.R. Imamaliyev, G.F. Ganizade,
Influence of single-walled carbon nanotubes on dielectric relaxation and electric conductivity of smectic a liquid crystal with positive dielectric anisotropy		  pdf 

ABSTRACT

The effect of single-walled carbon nanotubes (SWCNTs) on the dielectric and conductivity properties of smectic A liquid crystal 4- nitrophenyl -4'- decyloxybenzoic acid has been studied. It was shown that the additive of SWCNTs with concentration of 0.5% leads to a decrease in the order parameter of 5CB. In this case, the clearing point is raised, the longitudinal component of the dielectric permittivity decreases while the transverse component increases. The incipient percolation effect promotes to the dominance of hopping electron conductivity over ionic conductivity, leading to an increase in specific conductance.

Keywords: smectic A liquid crystal; single-walled carbon nanotubes, dielectric permittivity; electric conductivity
PACS: 64.70.mj; 64.70.pv; 77.84.Nh; 82.70.Dd.

Received: 19.10.2020

AUTHORS & AFFILIATIONS

Institute of Physics of Azerbaijan National Academy of Sciences, H.Javid av.131, Baku, AZ 1143, Azerbaijan
E-mail: tdibragimov @mail.ru 		REFERENCIES

[1]   N.R. Jber, A.A. Rashad, M. S Shihab. J. of Molecular Structure, 2013. 1043, 28–36.
[2]   S.P. Yadav, S. Singh. Progress in Materials Science, 2016. 80, 38-76.
[3]   D. Singh, U.B. Singh, M.B. Pandey, R. Dabrowski, R. Dhar. Optical Materials, 2018. 84, 16-21.
[4]   D. Singh, U.B. Singh, M.B. Pandey, R. Dhar. Liquid Crystals, 2019. 46 (9), 1389-1395.
[5]   T. Vimal, S. Pandey, S.K. Gupta, D.P. Singh, R. Manohar. 2015. Journal of Molecular Liquids, 204, 21-26.
[6]   G.V. Varshini, D.S. Rao, P.K. Mukherjee, S.K. Prasad. J.Phys. 2018. Chem. B, 122 (47), 10774-10781.
[7]   R. Verma, M. Mishra, R. Dhar, R. Dabrowski. Liquid Crystals, 2016. 44 (3), 544-556.
[8]   R. Verma, M. Mishra, R. Dharb, R. Dabrowskis. Journal of Molecular Liquids, 2016. 221, 190-196.
[9]   L. Blinov. Structure and Properties of Liquid Crystal, 2011. Springer: New York.