Tunneling current between structural elements of thin graphene/nanotube films

Based on the constructed atomistic models of graphene/nanotube films with different numbers nanotubes in supercells, we carried out silico studies regularities nonuniform density distribution, which determine presence an island structure such films. As a result quantum molecular dynamics modeling, it is found that thin tubes subnanometer diameter are enveloped graphene sheets, makes them energetically stable and stable. We also studied tunneling contacts between individual film fragments not covalently bound, particular, sheets topologies contacting zigzag armchair edges, depending distance them, chiralities, including (6,3), (4,4), (6,5), (12,6) (16,0). It tunnel semiconductor type conductivity characterized by voltage intervals negative differential resistance I-V characteristic. Such observed at all for metallic character conductivity. The new knowledge obtained important assessing electrical films, two-thirds tubes. Keywords: graphene, nanotubes, contacts.