Аннтотация

© 2020 Elsevier Ltd We suggest an idea of a new method for controlling the electrical conductivity of graphene-nanotube films using the physical effect that arises from the seamless contact of vertically oriented single-walled carbon nanotubes (SWCNTs) with graphene layers. When increasing the nanotube length by atomic layers in a graphene nanohole, the electrical conductivity of the graphene layer oscillates. This effect is based on the natural feature of armchair nanotubes, whose electronic properties and energy critically depend on the atomic framework length. The results of in silico studies show that the appearance of this effect leads to an increase in the electrical conductivity of graphene layers by 3–10 times. Besides, there is anisotropy: the electrical conductivity is 3–7 times greater in the armchair direction than in the zigzag direction. By adjusting the nanotube length, one can control the magnitude of the electrical conductivity and anisotropy. The amplitude of the oscillations is determined by the nanotube diameter, the symmetry of the transition zone of the seamless contact between graphene and nanotube, and the distance between nanotubes. To conduct in silico studies, an original approach is developed to identify energetically favorable SWCNT-graphene junctions during the formation of SWCNT of various diameters in a graphene nanohole.