Chemistry
How Dynamic Covalent Bonds Enable Self-Healing Materials
Quick fact
Some self-healing materials use reversible 'Diels-Alder' bonds that break when heated and reform when cooled, allowing a crack to heal simply by applying heat—no glue or manual repair needed.
Why this is interesting
Imagine a phone screen that repairs its own cracks, or a car paint that heals scratches when left in the sun. How can a material 'heal' itself like a living organism? The answer lies in the clever design of chemical bonds.