Materials hosting the right chemical may offer a colorful signal of stress
Engineers one day may not have to guess when a bridge is about to break. New materials that flush red in response to damage may provide a visible warning sign of trouble to come, scientists report in the May 7 Nature.
The materials’ chameleon-like abilities are thanks to a small four-ringed molecule called a mechanophore. When the weakest bond in the mechanophore breaks, the molecule create