Scientists have been able to demonstrate that graphene nanostructures can be generated by annealing of a nanostructured silicon carbide crystal for a few years. "These two-dimensional, spatially strongly restricted carbon bands exhibit a vanishingly small electrical resistance even at room temperature. They are thus ballistic," explains Prof. Dr. Christoph Tegenkamp, Head of the Professorship of Solid Surfaces Analysis at Chemnitz University of Technology. Something similar does not happen, for example, with an expanded and perfectly two-dimensional layer of graphene.