A new fish scale-inspired coating able to change color under strain could provide an early warning before a structure collapse.
Developed by a team from the Leibniz Institute of Polymer Research, the graphene-based material was inspired by the light reflecting qualities of fish scales. The coating features flakes of graphene aligned at angles that bounce light differently as the material is stressed. This difference in reflection is interpreted as red, yellow or green, offering a visual cue as to the current strain on the material.
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