Investigation of dielectric and electro-optical parameters of high birefringent nematic liquid crystal doped with TiO₂ nanoparticles and its applicability toward liquid crystal displays

Abstract

In the present study, anatase TiO₂ nanoparticles (NPs) have been doped in three different concentrations into nematic liquid crystal (NLC) 2020 (fluorinated 4’-alkylphenyl-4-isothiocyanatotolanes). The response time and contrast ratio has decreased and increased, respectively for the NLC-NPs composite system. Polarizing optical microscope images reveal that alignment has been improved after the doping of TiO₂ NPs. Dielectric measurement study shows that the tan δ has been decreased and relaxation frequency shifted toward the lower frequency region for the doped system. The outcome of the present investigation may be very useful in the improvement of electro-optical features of liquid crystal displays.

Keywords:

• Contrast ratio
• Nematic liquid crystal
• response time
• TiO₂ nanoparticles

Acknowledgements

The authors are thankful to APJ Abdul Kalam Center for Innovation for providing the experimental facilities.

Disclosure statement

No potential conflict of interest was reported by the authors.