The "Graphene and Nanotubes: science and applications" ("GNT") group is a national research group (GDR 3217) and an international coordination network (GDRI) cross-linking research on nanotubes and graphene. Its scientific activity is based on three vital and emerging research themes, which develop knowledge of basic properties of individual nano-objects as well as their manipulation for developing devices linked to the industrial and socio-economical world. The group gathers French, European and Canadian partners who have played a major role in the activities of the previous GDR, and to which are added scientists of international reputation working on graphene.