Scientists at the Technical University of Vienna invented a new type of 3D-printers and a new method, which they called two-photon lithography (two-photon lithography). For measurements of scientists constructed their 3D-printer is several orders of magnitude faster than any existing device for three-dimensional printing. In particular, the speed of printing up to several meters per second, which is truly a phenomenal result, because the printing speed of such devices is typically measured in millimeters per second.
A breakthrough in speed achieved by the use of a new rubber material, which initially is a liquid, but hardens when irradiated by photons. It is not possible to irradiate the layers, as is usually done with 3D-printing, and soon the entire volume of the container. In addition, the Austrian 3D-printer uses a special system of the moving mirror, which directs the laser.
Besides the fact that two-photon lithography – the fastest of the currently known methods of 3D-printing, it also allows you to create objects of nanometer level. The process of creating nanometer-model racing car is shown in the video.
The length of a racing car is 285 nanometers.
Other pictures depicted a model of St. Stephens Cathedral in Vienna
and a model of Tower Bridge in London (the distance between the towers – 90 nm).