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A new synthetic molecule switches between emitting green and blue light after application of a solvent or mild heat. The color-changing phosphor can be leveraged for a two-layered information encoding ...

When is a watch a smartwatch? When is a watch just a watch with a few gimmicks? And is there a middle ground for the latest wave of watches that mix personalization and apps with long battery life and ...

Light-emitting diodes (LEDs) are increasingly used to illuminate homes and offices; soon, the same lights could also transmit data to your computer or smartphone in photon pulses so fast the eye can’t ...