Antiferroelectric liquid crystals : hosts and binary mixtures

Parghi, Deven D.

Abstract

This thesis details the work carried out towards a doctoral degree in the synthesis, characterisation and evaluation of liquid-crystalline materials possessing antiferroelectric smectic C* (SmCA*) and non-chiral anticlinic smectic C (SmCait) phases. The effects of structural modifications of the materials on the occurrence and stability of the alternating-tilt smectic phases are described. The work was designed to evaluate the potential use of chiral-dopant antiferroelectric mixtures for antiferroelectric liquid crystal display devices (AFLCDs), analogous to the chiral- dopant ferroelectric mixtures used currently in ferroelectric liquid crystal display devices (FLCDs), for fast-switching display device applications. The most suitable materials from those prepared, including both optically active (chiral) dopants and achiral or racemic hosts, were selected and their applications in this novel mixture concept investigated. The switching characteristics of some model chiral-dopant binary mixtures were also studied, and the practical applicabilities of the mixtures developed are discussed.

Citation

Parghi, D. D. Antiferroelectric liquid crystals : hosts and binary mixtures. (Thesis). University of Hull. https://hull-repository.worktribe.com/output/4408280

• Thesis Type: Thesis
• Deposit Date: Oct 6, 2023
• Publicly Available Date: Oct 6, 2023
• Keywords: Chemistry
• Public URL: https://hull-repository.worktribe.com/output/4408280
• Additional Information: Department of Chemistry; University of Hull; ; uk.bl.ethos.397062
• Award Date: Apr 1, 2000