Effects of carbon nanotubes on electro-optic characteristics in vertically aligned liquid crystal display |
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| Authors: | Young Jin Lim Surjya Sarathi Bhattacharyya Weiwei Tie Hye Ryung Park Young Hee Lee |
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| Institution: | 1. Department of BIN Fusion Technology and Department of Polymer-Nano Science and Technology , Chonbuk National University , Jeonju , Jeonbuk , 561-756 , Korea;2. Institut de Physique et Chimie des Matériaux de Strasbourg-IPCMS , CNRS-Université de Strasbourg (UMR 7504) , 23 rue du Loess BP 43, 67034 , Strasbourg Cedex 2 , France;3. Center for Integrated Nanostructure Physics, Institute for Basic Science, Department of Physics and WCU Department of Energy Science , Sungkyunkwan University , Suwon , 440-746 , Korea |
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| Abstract: | Size- and aggregation-controlled dispersion of thin multiwalled carbon nanotube (t-MWCNT) in negative dielectric anisotropic liquid crystal (LC) material exhibits remarkable improvement in electro-optic response time in vertically aligned LC cells. The physical properties such as birefringence, dielectric anisotropy and clearing temperature of nanotube dispersed LC material appear to be almost invariant to that of pristine LC. Nevertheless, the response time shows noticeable improvement, especially in decaying time associated with transition from maximum to minimum transmission, hence important for faster switching LC devices. The effect is attributed to that vertically aligned t-MWCNTs along the field direction play role of vertical alignment layer between LCs, consequently resulting in increased bend elastic constant of LCs. |
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| Keywords: | carbon nanotube negative dielectric anisotropy LC vertically aligned LC cell response time |
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