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This paper reports surface treatment effect on liquid crystalline blue phase morphology and electro-optical performances at various temperatures. We have succeeded to achieve homogeneous monodomain blue phase morphology by surface treatment. Operating voltage and hysteresis of the proposed device is greatly reduced compared to the non surface treated cell, owing to dramatic increase in Kerr constant. Uniform mono domain morphology has better electric field withstand capability so that its original texture restored after electric field addressing. [ABSTRACT FROM AUTHOR]

- Three different blue-phase I liquid-crystal samples with different grain-size distribution were studied. Polycrystalline platelet grains reflects light in the visible region and have been observed under a polarizing optical microscope. Green and blue grain areas have been measured and then the statistical histogram by the Gaussian distribution function was fitted and the mean grain size was calculated. The effect of hysteresis on grain size has been compared for the three samples. Hysteresis depends explicitly on the grain-size distribution. Large grain size has revealed less hysteresis, while small grain size depicted pronounced hysteresis. [ABSTRACT FROM AUTHOR]

In this paper, we have reported a novel method for reducing hysteresis and operating voltage by stabilizing the disclination lines as well as double twist cylinders (DTCs). We have stabilized DTCs by incorporating photo reactive chiral monomer (SRM3) into the monomer mixed host blue phase liquid crystal (BPLC). Hysteresis and operating voltage of the proposed stabilized BPLC is reduced compared to the only disclination line stabilized BPLC. [ABSTRACT FROM AUTHOR]

A nano-material called POSS (Phenethyl-Poly Oligomeric Silsesquioxane) provides vertical alignment of LC on substrate without using conventional polymer type of vertical alignment layer. However, it still has many problems like aggregation because of high concentration doping. We synthesise new type of POSS which shows good dispersion with LC and found out that even very low 0.1 wt % into LC, uniform vertical alignment is achieved through diffusuion process from bulk LC to surface of the substrates. [ABSTRACT FROM AUTHOR]