Improvement in electro-optical and dielectric characteristics of ZnO nanoparticles dispersed in a nematic liquid crystal mixture

被引：27

作者：

Sharma, Amit ^{[1
,2
]}

Malik, Praveen ^{[1
]}

Dhar, Ravindra ^{[3
]}

Kumar, Pankaj ^{[4
]}

机构：

[1] Dr BR Ambedkar Natl Inst Technol, Dept Phys, Liquid Crystal Res Lab, Jalandhar 144011, Punjab, India

[2] Arni Univ, Arni Sch Technol, Indora 176401, India

[3] Univ Allahabad, Ctr Mat Sci, Soft Mat Res Lab, Allahabad 211002, Uttar Pradesh, India

[4] Chitkara Univ, Inst Engn & Technol, Dept Appl Sci, Patiala 140401, Punjab, India

来源：

BULLETIN OF MATERIALS SCIENCE | 2019年 / 42卷 / 05期

关键词：

Nematic liquid crystals; ZnO nanoparticles; dielectric permittivity; threshold voltage; conductivity; ELECTRICAL-PROPERTIES; BIREFRINGENCE; ORDER; MODE;

D O I：

10.1007/s12034-019-1902-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Reported herein is the effect of dispersion of a fixed amount of 0.5% (wt/wt) ZnO nanoparticles (NPs) in a nematic (E7) liquid crystal (LC) mixture. Dispersion of ZnO NPs results in a significant improvement in electro-optical and dielectric parameters of the nematic mixture. Comparative analysis of undoped and NP-dispersed samples shows a reduced threshold voltage with better transmittance without compromising dielectric permittivity characteristics. In addition, an increase in the contrast ratio, birefringence, alternating-current conductivity and band gap was observed after dispersion of ZnO NPs in LCs. A polarized optical microscopic study of the NP-dispersed sample substantiates a slight increase in nematic-isotropic phase transition temperature of LCs.

引用

页数：9

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