This paper addresses the effect of dopants on the electronic properties of zigzag (8, 0) semiconducting
single walled carbon nanotubes (SWCNTs), using extended Hückel theory combined
with nonequilibrium Green’s function formalism. Through appropriate dopant concentrations,
the electronic properties of SWCNTs can be modified. Within this context, we
present our ongoing investigation on (8, 0) SWCNTs doped with nitrogen. Quantum confinement
effects on the electronic properties of the SWCNTs have also been investigated. The
obtained results reveal that the electronic properties of SWCNTs are strongly dependent on
the dopant concentration and modification of electronic structures by hydrogen confinement.