The roots of 3D printing go back to sintering tungsten filaments for the early incandescent lamps, but today 3D printing may be the next “trillion dollar industry.”  One branch of that field, at Hebrew University in Jerusalem, has developed a “conductive ink” that works in ink-jet printing electronic circuits on inexpensive substrates (plastic or paper).   The ink contains silver nanoparticles in a “self-sintering” dispersion that hardens at room temperature. This could be a technology that has wide applications in making many medical devices. MORE