It's an entirely new method of “additive manufacturing” where the only thing added is 1 or 2 gigapascals of force. It might better be called 3D stamping, but by using “laser shock imprinting,” the process creates 3D crystalline metallic structures as small as 10 nm with ultrasmooth surfaces – and it does so at room temperature. Researchers from Purdue University and a couple other institutes of higher learning came together to pioneer the new technique, and it seems to have potential to bring 3D printing down to the nanoscale. Check out more details: http://3dprint.com/31221/laser-shock-imprinting/ ‎