Dispersions of nanomaterials in liquid crystals (LCs) have attracted considerable attention from the perspectives of not only the physical properties of the hybrid substances but also of the potential applications in electro-optical devices because of their unique electrical,optical,and structural properties.Recently,various types of nanomaterials,including carbon nanotubes [1],montmorillonite clay [2] and anatase TiO2 [3],have been employed as dopants in the LC–nanoadditive colloids and the dopant effects on the electrical,dielectric and ionic properties of the suspensions have been reported.In addition,thermal investigations have shown that the incorporation of a specific nanomaterial such as carbon nanotubes [4] and ZnO nanoparticles [5] in LC matrices enables the modification of phase transition temperatures of the LC hosts.