Thermodynamic, dielectric and electro-optical properties of a nematic liquid crystal namely 4-(trans-4-n-hexylcyclohexyl) isothiocyanatobenzoate (6CHBT) mixed with silver nanoparticles (Ag-NPs) of two widely different sizes have been studied. Thermodynamic studies suggest nominal increase in isotropic to nematic transition temperature of the nano composites as compared to the pure 6CHBT. Dielectric parameters of nano composites in the homeotropic and planar aligned samples have been measured in the frequency range of 1 Hz–35 MHz. Dielectric studies suggest that anisotropy is marginally decreased due to the dispersion of Ag-NPs. Threshold voltage for Freedericksz transition and splay elastic constant has decreased in the case of nano composites. Dielectric studies also suggest that relaxation mode corresponding to the molecular rotation about its long axis cannot be detected in the experimental window of the frequency. However, we obtained a relaxation mode due to the molecular rotation about its short axis.

已经研究了向列液晶，即4-（反-4-正己基环己基）异硫氰酸根合苯甲酸酯（6CHBT）与两种尺寸相差很大的银纳米颗粒（Ag-NP）混合的热力学，介电和电光性质。热力学研究表明，与纯6CHBT相比，纳米复合材料的各向同性向列相转变温度名义上增加。垂直和平面排列的样品中的纳米复合材料的介电参数已在1 Hz–35 MHz的频率范围内进行了测量。介电研究表明，由于Ag-NPs的分散，各向异性有所降低。在纳米复合材料的情况下，Freedericksz跃迁的阈值电压和展开弹性常数降低。介电研究还表明，在频率的实验窗口中无法检测到与分子绕其长轴旋转相对应的弛豫模式。但是，由于分子绕其短轴旋转，我们获得了弛豫模式。