Contribution of Multiwalled carbon nanotubes to dielectric and elastic properties in E7 nematic liquid crystal

• The doped carbon nanotubes of the nematic phase liquid crystal sample were analyzed by DS. • The dielectric anisotropy properties of the multiwall carbon nanotubes have been characterized using a C-V Method. • The dielectric strength properties were analyzed by Capacitance-Frequency. • Elastic constant parameters were investigated by dielectric spectroscopy technique. • Equivalent devices were analyzed by Cole-Cole Method. In this article, electrical parameters, and elastic constants of nematic liquid crystal (NLC) contributed multiwalled carbon nanotubes (MCN) are presented by dielectric spectroscopy method. The effects of reorientation on the nematic liquid crystal by doping of multi-walled carbon nanotubes were investigated to reveal. Analyzes of dielectric strength Δ ε ′ ( ω ) , absorption coefficient α, relaxation time τ, dielectric anisotropy Δ ε ′ V , dielectric anisotropy ratio γ, splay elastic constant K 11 , and cross-over angular frequency ω co of MCN contribution to E7 nematic liquid crystal with DC supply voltage are presented. Reorientation of elastic dipolar liquid crystal molecules was demonstrated by reducing the positive type (p type) dielectric anisotropy value in the broadband angular frequency range with the MCN contribution to the E7 coded nematic liquid crystal. The supply voltage applied to the NLC samples was observed to have nearly Debye-type relaxation mechanism in the host E7 LC structure, tending to switch to a Debye-type relaxation mechanism by MCN doping. Dipole effects were enhanced by doping of multi-walled carbon nanotubes in the orientation of elastic NLC molecules, and the relaxation time of host E7 NLC and doped MCN/E7 NLC decreased with increasing bias voltages. Cole-Cole analysis with different supply voltages, it has been seen that it turns into a new equivalent circuit depending on the MCN contribution.