Development of nanostructures for the creation of mechanical metamaterials

© Photo Fraunhofer IWM

In order to design the mechanical properties of metamaterials, we employ three-dimensional nanolithography. In our application, framework structures with a minimal thickness of 100 nm are polymerized out of a photoresist by a femtosecond laser. The unit cells of these structures are constructed so that they show a desired mechanical property when coupled in a large matrix. The structure shown below is extremely stiff when considering its weight. Its design is for the mechanical stabilization of other components, which could be given a metallic coating and used in strain sensors.