Researchers at Finland’s Aalto University have manufactured artificial materials with engineered electronic properties. By moving individual atoms under their microscope, the scientists were able to create atomic lattices with a predetermined electrical response. The possibility to precisely arrange the atoms on a sample bring 'designer quantum materials' a step closer to reality. By arranging atoms in a lattice, it becomes possible to engineer the electronic properties of the material through the atomic structure. “There are many fascinating theoretical proposals that don't exist in real materials. This is our chance to test these ideas experimentally,” explains researcher Teemu Ojanen.