Abstract Incorporation of magnesium oxide nano particles (MgONPs) in a nematic liquid crystal display material namely 4-pentyl-4'-cyanobiphenyl (5CB) have been analyzed by differential scanning calorimeter, polarizing light microscopy and dielectric spectroscopy. MgONPs have been dispersed in two different concentrations in pure 5CB viz. 0.2 and 0.6 wt%. It has been experimentally noticed that with the increase of MgONPs concentrations in 5CB, the nematic to isotropic transition temperatures decreases and dielectric anisotropy increases. Relaxation frequency of an observed relaxation mode corresponding to molecular rotation about the short axis is almost unchanged after dispersion of MgONPs. The ionic conductivity has increased by approximately one order of magnitude for 0.6 wt% MgONPs and decreased for 0.2 wt%.

中文翻译：

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将氧化镁纳米颗粒掺入向列液晶基质中

摘要 已通过差示扫描量热计、偏光显微镜和介电光谱分析了氧化镁纳米颗粒 (MgONPs) 在向列液晶显示材料即 4-戊基-4'-氰基联苯 (5CB) 中的掺入。MgONPs 以两种不同的浓度分散在纯 5CB 中，即。0.2 和 0.6 重量％。实验表明，随着 5CB 中 MgONPs 浓度的增加，向列到各向同性的转变温度降低，介电各向异性增加。在 MgONPs 分散后，观察到的对应于分子绕短轴旋转的弛豫模式的弛豫频率几乎没有变化。对于 0.6 wt% MgONPs，离子电导率增加了大约一个数量级，而在 0.2 wt% 时则降低了。