Earlier, and perhaps more basic, LED masks usually provide just one primary colour treatment mode, such as red or blue, ...

Lead-halide perovskite nanocrystals (NCs) are promising for fabricating deep-blue (<460 nm) light-emitting diodes (LEDs), but their development is plagued by low electroluminescent performance and ...

Anaerobic bacteria were among the first life forms on Earth and existed at a time when there was no oxygen in the atmosphere.