Nanocrystalline LEDs: Red, green, yellow, blue...

The color of the light emitted by an LED can be tuned by altering the size of their semiconductor crystals. Researchers have now found a clever and economical way of doing just that, which lends itself to industrial-scale production.

Gold specks raise hopes for better cancer treatments

A tiny medical device containing gold specks could boost the effects of cancer medication and reduce its harm, research suggests.