Carbon nanomaterials is an incredibly exciting, fast- growing area of nanotechnology, with large potential implications for society. With Carbonhagen 2010 we want to strengthen interaction and collaboration between researchers and students in the field, and to address important questions regarding fundamental properties as well as practical application of carbon nanomaterials ...and thereby maximise the carbon footprint! Carbonhagen 2010 is a two day symposium on graphene and carbon nanotubes, jointly organised by the Technical University of Denmark, the University of Copenhagen and Nano Connect Scandinavia. The symposium will cover fabrication, physical properties (electronic, chemical and optical properties), device integration and applications in two sessions.