We have succeeded in preparation of liquid crystal sol containing oleophilic Pd nanoparticles (NPs) stabilized by multidentate copolymer and fabrication of the twisted nematic liquid crystal devices (TN-LCDs) by using Pd NP-containing liquid crystal sol. Oleophilic Pd NPs were prepared
by refluxing Pd acetate solution in toluene/ethanol containing poly(N-vinyl-2-pyroridone-co-styrene). Oleophilic Pd NPs showed better solubility in liquid crystal medium than poly(N-vinyl-2-pyrrolidone)-stabilized NPs. The TN-LCDs were fabricated by using two kinds of
practical liquid crystal materials doped with oleophilic Pd NPs. The NP-doped LCD showed 22% faster response than non-doped one at −20 °C without a chiral dopant. However, LCDs fabricated by liquid crystal materials with a chiral dopant were not affected by NPs. These results suggest
that the effect of NPs on the electro-optic performance of LCD is incompatible with that of a chiral dopant.
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