A new approach developed by Oak Ridge National Laboratory (ORNL) creates seamless electrical contacts between precisely controlled nanoribbons of graphene, making the material viable as a building block for next-generation electronic devices.   In a recent study, an ORNL-led team grew the popular, atomic-thick semi-metallic graphene material as semiconducting ribbons, constructed from the bottom up using a precise number of atoms across and a precise molecular structure at the edge.   To be ...