30 April 2003 Polymer-enhanced bend-mode nematic displays
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We describe a detailed study of the bend nematic structure stabilized by the polymer network. The formation of phase-separated polymer network in a bend nematic structure is affected by various factors, such as the polymer network morphology, polymer concentration, applied electric field, UV exposure time, and UV intensity. SEM images of the polymer network morphology show a templating effect, where highly ordered nanofibers mimic the bend state of the liquid crystal. At low monomer concentration and low curing voltage, liquid crystal can be oriented into the twist or splay state. High monomer concentration conveys excessive strength of the polymer network on liquid crystal and shows poor electro-optical properties of liquid crystal. With the current nematic host, the best condition of our experiments is 3% monomer concentration and 5V curing voltage. The resulted liquid crystal-polymer composite shows fairly fast optical response to the applied field.
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Sang Hwa Kim, Sang Hwa Kim, Liang-Chy Chien, Liang-Chy Chien, } "Polymer-enhanced bend-mode nematic displays", Proc. SPIE 5003, Liquid Crystal Materials, Devices, and Applications IX, (30 April 2003); doi: 10.1117/12.482351; https://doi.org/10.1117/12.482351

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