Factors in liquid crystal photoalignment on polymer films: photoorientation versus self-assembly |
| |
| Authors: | O. Yaroshchuk V. Chigrinov O. Nadtoka H. Kwok |
| |
| Affiliation: | a Institute of Physics, NASU, 03028 Kyiv, Ukraineb Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, PR Chinac Kyiv National Taras Shevchenko University, 01033 Kyiv, Ukraine |
| |
| Abstract: | We demonstrate that photostimulated self-assembly, running in parallel with molecular photoorientation in the top layer of the aligning polymer film, breaks the bulk molecular order mainly determined by the symmetry of irradiation. This may substantially modify liquid crystal (LC) alignment. Depending on the chemical composition of the liquid crystal, the self-assembled layers may influence either homeotropic or planar LC alignment with extremely weak azimuthal anchoring. Effective self-assembly occurs in polymers having side chain chromophores with flexible spacers and polar terminal groups. |
| |
| Keywords: | |
| 本文献已被 InformaWorld 等数据库收录！ |
|
