Observation of memory behaviour in cadmium sulphide nanorods doped ferroelectric liquid crystal mixture

Abstract

In this study, cadmium sulphide (CdS) nanorods doped ferroelectric liquid crystal (FLC) sample cells have been prepared and studied. A memory effect has been observed in CdS nanorods (≤0.3 wt%) doped FLC mixture and confirmed by textures, dielectric and optical studies. The addition of nanorods increases the memory behaviour and efficiency. The occurrence of memory behaviour has been explained due to charge transfer from liquid crystal molecules to CdS nanorods and exists there for 5–15 min in 0.1–0.3 wt% CdS nanorods doped samples. An improvement in polarization, switching time, threshold voltage and rise time parameters has also been noticed in CdS nanorods doped FLC samples.

Keywords:

• ferroelectric liquid crystal
• cadmium sulphide nanorods
• memory effect
• switching time

Acknowledgements

The authors thank the Director, NIT Jalandhar and Thapar University Patiala for providing the experimental facility. Ashok Chaudhary is thankful to MHRD, New Delhi, India, for financial assistance. The study was also supported by DST, New Delhi, India, under project no. SR/FT/CS-50/2011.