color-changing materials

Appearing green on a vial lid (left), this structural color material becomes colorless (right) when warmed. Adapted from ACS Nano 2023, DOI: 10.1021/acsnano.3c00467
Color-changing materials indicate when drugs or food gets too warm
New bio-based smart skin is a flexible color-changing film inspired by chameleons
A new film made of gold nanoparticles could allow robots to mimic chameleons and octopi — among other futuristic applications