#TITLE_ALTERNATIVE#
Abstract : <br /> <br /> <br /> <br /> <br /> Liquid crystal MBBA which is doped with 2.11, 4.22 and 6.33 mole-% chiral molecule, CB15, exhibits a significant increase in its mesophase - isotropic transition temperature. CB15 induces phase change from nematic to ch...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/7322 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Abstract : <br />
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Liquid crystal MBBA which is doped with 2.11, 4.22 and 6.33 mole-% chiral molecule, CB15, exhibits a significant increase in its mesophase - isotropic transition temperature. CB15 induces phase change from nematic to chiral nematic or cholesteric and shows two different textures that are lamellar and focal conic fan. The inverse pitch of cholesteric phase is a function of mole percentage of the chiral dopant. By applying an electric field across pixel reorients optical axis of liquid crystal and reduce the transmitted light through a cross polarizer system. Pixel of pure MBBA with 10 um cell gap indicates a threshold voltage of 3 volt and 3 - 7.5 volt for pixel of MBBA doped with 2.11% CB15 with cell gap of 20 um. Chiral nematic phase gives a sharper electro-optic respons curve. <br />
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