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  • Title: Tunable pretilt angles based on nanoparticles-doped planar liquid-crystal cells.
    Author: Jeng SC, Hwang SJ, Yang CY.
    Journal: Opt Lett; 2009 Feb 15; 34(4):455-7. PubMed ID: 19373339.
    Abstract:
    The nanoparticles-induced vertical alignment technique was applied to generate variable liquid-crystal pretilt angles based on doping different concentrations of polyhedral oligomeric silsesquioxane (POSS) nanoparticles in the planar-aligned liquid crystal cells. Competition between the homogeneously aligned polyimide layer and POSS-induced spontaneous vertical alignment domain generated the variable pretilt angle. Experimental results demonstrated that the pretilt angle theta(p) is a function of the doped POSS concentration and can be controlled continuously over the range of 0 degrees <theta(p)<90 degrees .
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