Abstract:
Quasi-2D hybrid carbon films formed by horizontally oriented single-walled zigzag (10,0) nanotubes sandwiched between two graphene sheets and covalently bonded to them have been studied within the density functional based tight binding method. The effect of single-vacancy defects on the electronic and electrophysical properties of hybrid graphene-nanotube films has been analyzed. It has been found that both defect-free and defective hybrid films are characterized by the presence of an energy gap in the band structure. With the appearance of defects and an increase in their number, the energy gap begins to narrow. Partial charge transfer from the nanotube to the graphene sheets has been revealed. The charge transfer increases with the appearance of defects and leads to an increase in the anisotropy of electrical conductivity in hybrid graphene-nanotube films.
Keywords:single vacancy defect, density of electron states, electrical conductivity, charge transfer.
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