Ferroelectric nanoparticles in low refractive index liquid crystals for strong electro-optic response

被引：78
|
作者：
Kaczmarek, M. [1 ]
Buchnev, O. [1 ]
Nandhakumar, I. [2 ]
机构：
[1] Univ Southampton, Sch Phys & Astron, Southampton SO17 1BJ, Hants, England
[2] Univ Southampton, Sch Chem, Southampton SO17 1BJ, Hants, England
来源：
APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 10期
关键词：
Atomic force microscopy - Birefringence - Electrooptical effects - Ferroelectric materials - Nanoparticles - Particle size - Refractive index;
D O I：
10.1063/1.2884186
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Functional materials based on ferroelectric, inorganic nanoparticles, and low refractive index nematic liquid crystals show strong induced birefringence and dielectric anisotropy. Birefringence can increase by a factor of 2 and dielectric anisotropy by a factor of 3 as compared with nominally pure liquid crystals. The enhancement of the electro-optic performance is higher in liquid crystals with Sn2P2S6 (SPS) nanoparticles than with BaTiO3 nanoparticles. The shape and size distribution of both types of ferroelectric particles were characterized using atomic force microscopy. The average size of SPS nanoparticles was 45 nm and of BaTiO3 nanoparticles was 20 nm. (c) 2008 American Institute of Physics.
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