2023   02   en   p.39-43 T.D. Ibragimov, A.R. Imamaliyev, G.A. Muradova,
Change of mesogenic properties of liquid crystal 5СB at the presence of silver nanorods		  pdf 

ABSTRACT

Influence of silver nanorods on mesogenic properties of nematic liquid crystal 4- cyano-40-pentylbiphenyl (5CB) is investigated by the methods of differential scanning calorimeter, polarization microscopy, and dielectric spectroscopy. It is shown that the temperature of the nematic-isotropic transition increases. In this case, there is a decrease in enthalpy and entropy of the phase transition at presence of silver nanorods.

Keywords: nematic liquid crystal; silver nanorods; polarization microscopy; differential scanning calorimetry; electric conductivity; dielectric permittivity.
PACS: 64.70.mj; 64.70.pv; 77.84.Nh; 82.70.Dd.

DOI:-

Received: 11.04.2023

AUTHORS & AFFILIATIONS

Institute of Physics, Ministry of Science and Education of Azerbaijan 131, H. Javid ave., Baku, АZ 1143
E-mail: tdibragimov @mail.ru

Graphics and Images

Fig.1-2-3-4

 REFERENCIES

[1]   U.B. Singh, R. Dhar, R. Dabrowski, et al. Influence of low concentration silver nanoparticles on the electrical and electro-optical parameters of nematic liquid crystals. Liq. Cryst. 40 (6) (2013) 774–782.
[2]   K.N. Singh, B. Gogoi, N.M. Singh, et al. On the dipole–dipole correlation and dielectric anisotropy of some N (4-N-alkyloxy benzylidene) 4′-N-alkylaniline compounds doped with silver nanoparticles. Mol.Cryst.Liq. Cryst. 625(1) (2016)106–116.
[3]   B. Gogoi, K. N Singh, R. Mishra, et al. Study of dielectric properties and the molecular dynamics using Raman spectroscopy in pure and nanoparticle doped liquid crystal compound, 6O.4. Mol.Cryst.Liq.Cryst. 646 (1) (2017) 3–13.
[4]   M. Inam, G. Singh, A. M. Biradar, D. S. Mehta. Effect of gold nano-particles on switch-on voltage and relaxation frequency of nematic liquid crystal cell. AIP Advances, 14 (2011) 042162-1-7.
[5]   M. Mishra, R. S. Dabrowski, J. K. Vij, A. Mishra, R. Dhar. Electrical and electro-optical parameters of 4ʹ-octyl-4-cyanobiphenyl nematic liquid crystal dispersed with gold and silver nanoparticles. 42(11) (2015) 1580-1590.
[6]   R. Katiyar, K. Agrahari, G. Pathak, T. Vimal, G. Yadav, K. K. Pandey, A. K. Misra, A. Srivastava, R. Manohar. Silver nanoparticles dispersed in nematic liquid crystal: an impact on dielectric and electro-optical parameters Journal of Theoretical and Applied Physics. 14 (2020) 237–243.
[7]   S.K. Prasad, K.L. Sandhya, G.G. Nair, U.S. Hiremath, C.V. Yelamaggad, S. Sampath. Electrical conductivity and dielectric constant measurements of liquid crystal–gold nanoparticle composites. Liquid Crystals, 33(10) (2006) 1121–1125.
[8]   S. Mishra, V. Manjuladevi, R.K. Gupta, S. Kumar. Investigation on Physical Properties of Silver Nanorod Doped Nematic Liquid Crystal. National Conference on Physics and Chemistry of Materials AIP Conf. Proc. 2369 (2021) 020065-1-5.