Self-folding origami: Chemical programming allows Nafion sheets to fold and refold
(PHYSorg.com Chemistry)

Plastic with a thousand faces: A single piece of Nafion foil makes it possible to produce a broad palette of complex 3D structures. In the journal Angewandte Chemie, researchers describe how they use simple chemical `programming` to induce the foil to fold itself using origami and kirigami principles. These folds can be repeatedly `erased` and the foil can be `reprogrammed`.