Orientation of Liquid Crystal and Electro-Optic Characteristic Effect of dispersed Carbon nanotubes in In Plane Switching Cell

탄소 나노 튜브가 분산된 수평전기장을 이용한 액정 셀의 액정 방향성과 전기 광학특성 연구

To observe the orientation of carbon nanotubes (CNTs) dispersed in nematic liquid crystal (NLC), CNT-doped homogeneously-aligned NLC cells driven by in-plane field was fabricated. The CNTs were aligned with a LC director in the initial state, whereas the CNTs disturbed the LC director above critical ac field. We observed motional textures in the form of vertical stripes in the local area between electrodes, which were associated with a deformation of the LC director orientation. This suggests that CNTs start to vibrate three dimensionally with translational motion. The hysteresis studies of voltage-dependent transmittance under dc electric field show that the amount of residual dc is greatly reduced due to ion trapping by CNT.