Dipole Dynamics of a Nano Doped Weakly Polar Liquid Crystal

Abstract

The dielectric measurements of a weakly polarized nematic liquid crystal (D6AOB) were carried out in the frequency range 100 Hz to 40 MHz and in the voltage range from 0 to 40 V at 100 Hz. The dielectric data were measured for two principal alignments, homeotropic and planar. The angle β between the long molecular axis and dipole moment of the molecules is calculated from Cole-Cole plots using Onsager theory, both for pure and doped liquid crystal. Here is an attempt to discuss the Δϵ v/s voltage on the basis of piezoelectric strain, which is in good agreement with experimental results.

Keywords:

• Dielectric anisotropy
• dipole dynamics
• nanoparticles
• nematic liquid crystal

Acknowledgments

The author is sincerely thankful to CSIR (New Delhi, India) for providing the financial support in the form of SRF. The authors are also thankful to Sponsored Research, Indian Space Research Organization for providing grant in the form of project.