A research team at the University of California at Berkeley has created nanoscale lasers from pure crystals of zinc oxide. The crystals are grown from hot zinc oxide gas using a gold catalyst on sapphire. The process forms regularly spaced nanocrystals, which in turns spurred the growth of pure zinc oxide wires measuring only 20 to 150 nanometers in diameter. The lasers emit blue and ultraviolet light, and operate at room temperature. The team reports its development in the June 8 issue of Science. Additional information is available in this report from United Press International.