通过硅烷缀合合成化学和热稳健的液晶硅烷官能化金纳米颗粒(即AuNP1-AuNP3)。具有介晶配体的这些颗粒的胶体分散体与向列型液晶(N-LC)主体的分子结构相同(如在AuNP1、AuNP2中)或相容(如在AuNP3中)显示出优异的胶体稳定性和分散性。热,光学,研究了N-LC复合材料在不同金纳米粒子浓度下的电光行为。所有分散体显示较低的旋转粘度和弹性常数,但只有在纳米粒子配体和主体之间具有不同结构的AuNP3显示出最剧烈的热效应和对主体的电光性质的总体最强影响。考虑到每个金纳米颗粒的表面配体的结构和密度来解释观察到的结果。
Chemically and thermally robust liquid crystal silane-functionalized gold nanoparticles (i.e. AuNP1-AuNP3) were synthesized through silane conjugation. Colloidal dispersions of these particles with mesogenic ligands that are structurally identical (as in AuNP1, AuNP2) or compatible (as in AuNP3) with molecules of the nematic liquid crystal (N-LC) host showed superior colloidal stability and dispersibility. The thermal, optical, and electro-optic behaviors of the N-LC composites at different concentrations of each gold nanoparticle were investigated. All dispersions showed lower values for the rotational viscosity and elastic constant, but only AuNP3 with a dissimilar structure between the nanoparticle ligand and the host displayed the most drastic thermal effects and overall strongest impact on the electro-optic properties of the host. The observed results were explained considering both the structure and the density of the surface ligands of each gold nanoparticle.