Imprintable screen with liquid crystal potentially paves the way for new lasers, display screens, and microscopic tags

https://www.smu.edu/news/research/a-synthetic-molecular-switch-lets-you-paint-with-natural-light

"switch made of organic molecule triptycene and hydrazone compounds triggers liquid crystal shape changes allowing them to reflect different colors... flip on/ off with natural light pulse... chiral triptycene interacts with liquid crystal molecule, causing other liquid crystal molecules to fall in line, rearranging in twisted, DNA-like helices, reflecting light at different wavelengths, stretching/ compressing triggers color changes... painted pattern can stay there for days... microscopic tags on bank notes deterring counterfeiters"