Scientists have demonstrated, for the first time, an on-chip visible light source using graphene as a filament. They attached small strips of graphene to metal electrodes, suspended the strips above the substrate, and passed a current through the filaments to cause them to heat up. This was achieved by James Hone’s group at Columbia Engineering, a team of scientists from Columbia University, Seoul National University (SNU), and Korea Research Institute of Standards and Science (KRISS), led by Young Duck Kim, a postdoctoral research scie
