Suspended,one-side anchored,or double-side anchored nematic droplets in an isotropic medium |
| |
Authors: | Soo-Dong Kim Jin-Kun Guo |
| |
Affiliation: | 1. School of Electronic &2. Electrical Engineering, Sunkyunkwan University, Suwon, South Korea;3. Display R&4. D Center, Samsung Display Company, Yong-in, South Korea |
| |
Abstract: | Nematic droplets in an isotropic liquid crystal provide an interesting geometrical environment for director alignment, depending on the type of surface used. We prepared three types of substrates with nematic-philic, nematic-phobic, and neutral surfaces. By choosing the proper surface type, we were able to selectively produce three types of droplets (suspended, one-side anchored, and double-side anchored) near the phase transition temperature. These droplets exhibited single-polar or bipolar defects depending on the anchoring status. The one-side anchored and the suspended droplets underwent anchoring transitions in one-step and in two-steps processes on cooling, respectively. A hybrid cell with two types of substrates exhibited a truncated cone-shaped droplet, and two nearby cone-shaped droplets produced a stable doule-curved surface geometry with a saddle point of – 1 defect between isotropic-nematic boundaries. The mergence of these droplets was also investigated. |
| |
Keywords: | Nematic droplet biphase anchoring transition saddle point |
|
|