Document Type : Research Paper
The Density Functional Theory (DFT) and the Natural Bond Orbital (NBO) calculations based
method B3LYP/6-31G* were carried out to study the interaction of carbon nanotube (8,0) with
nitrobenzene in two situations perpendicular and parallel. Formation energies of compounds,
charges, the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular
'orbital (LUMO) and the HOMO-LUMO band gap were calculated. The parallel direction is more
stable than the perpendicular direction. The lower HOMO-LUMO gaps confirm this stability.