Frequency Modulation Response of a Tunable Birefringent Mode Nematic Liquid Crystal Electrooptic Device Fabricated by Doping Nanoparticles of Pd Covered with Liquid-Crystal Molecules : Structure and Mechanical and Thermal Properties of Condensed Matter

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We fabricated a tunable birefringent(TB) mode nematic liquid-crystal(NLC) electrooptic device using NLC-K15 (Merck) as a host NLC(called NLC-1), where the cell is doped with Pd nanoparticles covered with NLC(NLC-2) molecules, having a cyano group such as 5CB(Merck) with positive dielectric anisotropy (Δε>0) or CCN-47(Merck) with negative Δε(Δε<0). The diameter of the core Pd particle is 2.5 nm and the concentration of nanoparticles is 1 wt%. The TB mode LCD cell fabricated in this way exhibits a remarkable frequency modulation response below 100Hz of the driving voltage waveform. It is considered that the frequency modulation(FM) response of the TB-NLCD may be attributed to Maxwell-Wagner type interfacial polarization between the host NLC medium and doped nanoparticles.
社団法人応用物理学会の論文
2002-11-15