| Summary: | 碩士 === 國立交通大學 === 光電工程系所 === 94 === In order to improve the electro-optical properties and response time of FLC material, doping with nanostructured materials is a newly developed technique to achieve the goal. In this thesis, we compare electrical properties and electro-optical dynamics of the surface-stabilized ferroelectric liquid crystal (SSFLC) with doping of ZnO nanocrystals (nc-ZnO) and without doping. We use several kinds of techniques, including imaging polarimetry, C-V hysteretic characterization, time-resolved electro-optical response and time-resolved FTIR, to analyze the above mentioned properties. We find that the nc-ZnO doping can improve the azimuthal and the polar alignments of FLC by reducing the full-width-and-half-maximum (FWHM) width. The approach readily improves the optical transmission property of FLC by 2.27 times at no applied field and reduces the switching time of the electro-optical response by a factor of 0.5. By using 2D IR correlation, we discovered that ZnO nanocrystals produce a novel binding effect on sub molecular fragments of FLC molecules, which lead to an improved LC alignment quality in both steady-state and dynamic processes.
|
|---|
