Azopolymer material allows light-assisted imprinting of nanostructures for structurally colored surfaces
(PHYSorg.com Nanotechnology)

Structural colors appear because the imprinted pattern on a surface changes the wavelengths of light. Chinese scientists have introduced an azopolymer that allows the imprinting of nanopatterns in a novel room-temperature lithographic process. A key aspect of the technique is the light-induced phase change of a novel azopolymer, explains the study published in the journal Angewandte Chemie. The process relies solely on light regulation and allows nanoimprinting even on flexible substrates.