Dielectric behavior of carbon-nanotube-doped ferroelectric liquid crystal mixture

Abstract

The dielectric spectra of pure and 0.1% multi-walled-carbon-nanotube-(MWCNT)-doped ferroelectric liquid crystal (FLC) mixture KCFLC10S materials were studied in the 50 Hz to 1 MHz frequency range at different bias voltages. An unusual behavior-increase of ϵ′ with increasing E was observed in both samples. It was found that although the relaxation mode was not observable in the MWCNT-FLC sample, the increased effect of the bias voltage on the FLC with the addition of MWCNTs is clearly visible. A theory is presented to explain this effect of MWCNTs in the FLC material.

Keywords:

• ferroelectric liquid crystals
• multi-walled carbon nanotubes
• relaxation frequency
• Goldstone mode
• new relaxation mode

Acknowledgements

The authors wish to thank Dr Rajesh K. Mahajan (Principal, JCDAV College, Dasuya) for his support of this project. The financial support provided by the Department of Science and Technology, New Delhi is also gratefully acknowledged.