Shear-Aligned Cholesteric Liquid Crystal Elastomers: Effect of Molecular Weight on the Helical Structure
발표자
()
초록
내용
Cholesteric liquid crystal elastomers (CLCEs) are an interesting class of 1D photonic materials that can reflect incoming wavelength of light in a selective and tunable manner by external stimuli. Conventional CLCEs prepared by anisotropic deswelling or surface alignment methods display a planar alignment in which the helical axis is perpendicular to the substrate. Herein, we present a facile method to tilt the helical axis of the CLCE by shear-aligned blade coating. Most importantly, the slanted angle of the helical axis by adjusting the molecular weight of precursors was effectively manipulated, leading to a viewing angle-dependent structural color change. Our facile method to control the slanted angle of CLCE without a complicated optical setup can be extremely valuable for reflective LC grating, holographic films, and reflective mirrors for AR/VR devices.