ABSTRACT
Blue phase (BP) temperature range of a chiral nematic liquid crystal (LC) mixture is dependent upon the host nematic LC chemical structure and chiral dopant concentration. In this study, we investigated BP phase transition behaviour and helical twisting power (HTP) using three chiral dopant concentrations of cyano compound chiral nematic LC mixtures incorporating three two-ring core structures in the host nematic LCs. The effect of the host nematic LC core structure, HTP and chiral dopant concentrations were considered on BP temperature ranges, for two types of complete BPI and BPII without isotropic phase (Iso) and two types of coexistence state of BPI+Iso and BPII+Iso.
Acknowledgments
We thank Professor Kikuchi for providing the chiral dopant, ISO-(6OBA)2. Also we thank JNC Co. Ltd. for providing the nematic LC mixture, JC-1041XX.
Disclosure statement
No potential conflict of interest was reported by the authors.