The influence of gold nanoparticles on electro-optical properties of nematic liquid crystal

This work aimed to look into how N-(4-methoxybenzylidene)-4-n-butylaniline (MBBA) liquid crystal's (LCs) electro-optical properties are affected by gold nanoparticles (Au NPs). A sandwich approach has been used to construct LC optical switch cells samples. It has been found that changing the Au NPs concentration can alter the electro-optical characteristics of MBBA LC samples; therefore, liquid crystal doped with 0.1 wt% of AuNPs showed the best concentrate that improves response time from 44 ms for pure LC to 38.96 ms for 0.1 wt %. This is due to the fact that the electric dipole-dipole interaction between Au NPs at 0.1 wt % concentration and the liquid crystal molecules is better than for the others. Moreover, the threshold voltage was around 44% lower than with pure LC.