Effect of nanoparticle chain formation on dielectric anisotropy of nematic composites.
Effect of nanoparticle chain formation on dielectric anisotropy of nematic composites.
复制标题
纳米颗粒链形成对向列复合材料介电各向异性的影响。
DOI：
10.1103/physreve.92.032501
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Osipov MA
中科院分区：
文献类型：
--
作者：
Osipov MA
本文提出了一种双折射液晶混合物介电常数的一般理论，包括向列相掺杂极性纳米粒子的特殊情况。结果被用来估计链的极性纳米粒子的静态介电各向异性和双折射的复合材料考虑到不同长度的链的贡献的贡献。的介电各向异性的偶极相互作用强度的依赖被认为是详细的，它表明，形成的纳米粒子的极性链，使人们能够解释实验观察到的复合材料的介电常数的显着增加。
A general theory of the dielectric constant of nematic liquid crystal mixtures is presented including the particular case of nematics doped with polar nanoparticles. The results are used to estimate the contribution of chains of polar nanoparticles to the static dielectric anisotropy and birefringence of the nematic composite taking into account contributions from chains of different lengths. The dependence of the dielectric anisotropy on the dipolar interaction strength is considered in detail and it is shown that formation of polar chains of nanoparticles enables one to explain a significant increase of the dielectric constant of the composite as observed experimentally.