This is due to the special “ink” consisting of silver nanoparticles, which at the time of their appearance from the “pen” are sintered by means of a laser, forming metal products of complex curved shape.
Unlike traditional 3D printers, the Harvard “pen” is not tied to a particular printing site, but can move freely in space. The main problem faced by scientists is to determine the optimal distance between the pen-nozzle and the laser. To create objects such as wire butterflies go away in just a few seconds.
In the future, such hand-held 3D printers can find application in the printing of flexible portable electronics or in medical devices using metal structures that are created “in place”.