Fascinating research: Butterfly-inspired films create vibrant colors while passively cooling objects. They could significantly reduce the energy needed for cooling buildings or vehicles

On ScienceDaily

https://www.sciencedaily.com/releases/2023/08/230803112920.htm

Original https://opg.optica.org/optica/fulltext.cfm?uri=optica-10-8-1059&id=535894