Colour-changing metal has many talents

摘要

We Present the metal of many colours. Nano-sized sheets of a unique alloy take on different hues with the flick of a switch, offering a way to make full-colour displays for wearable computers such as Google Glass. The germanium-antimony-tellurium alloy can be switched between an amorphous phase, in which its molecular structure is disordered, and a highly ordered crystalline phase by the energy of a laser beam or electric current.