Effect of ferroelectric BaTiO3 particles on the threshold voltage of a smectic A liquid crystal

Beilstein Journal of Nanotechnology

关键词: colloidal systems;    dielectric permittivity;    ferroelectric BaTiO3 particles;    smectic A liquid crystals;    threshold voltage;   

DOI  :  10.3762/bjnano.9.76

学科分类：地球科学(综合)

来源: Beilstein - Institut zur Foerderung der Chemischen Wissenschaften

【 摘 要 】

The influence of small ferroelectric BaTiO3 particles on the planar–homeotropic transition threshold voltage in smectic A liquid crystals consisting of p-nitrophenyl p-decyloxybenzoate and 4-cyano-4′-pentylbiphenyl were studied by using capacitance–voltage (C–V) measurements. It was shown that the BaTiO3 particles significantly reduce the threshold voltage. The obtained result is explained by two factors: an increase of dielectric anisotropy of the liquid crystals and the formation of a strong electric field near polarized particles of BaTiO3. It was shown that the role of the second factor is dominant. The explanations of some features observed in the C–V characteristics are given.

【 授权许可】

CC BY