Color-changing liquid-crystal films

A facile preparation strategy based on anisotropic deswelling is developed to achieve uniformly colored large‐area cholesteric liquid crystal (CLCE) films. The CLCE exhibits rapid and reversible color changes to any mechanical deformation locally or globally. This easily scalable approach for fabricating CLCE films opens up possibilities for numerous applications. https://doi.org/10.1002/adfm.201909537