A study was made of the effect of the orientation of Stone-Wales defects, formed on the armchair single-wall carbon nanotubes, upon their metal-semiconductor behavior by means of the density functional formalism. It was shown that two thirds of possible orientations of Stone-Wales defects, at high concentrations, opened a 40meV gap at the Fermi level while, in the other one third of the orientations, the nanotube remained metallic.

The Effect of the Orientation of the Stone-Wales Defects on the Bands Structure of Carbon Nanotubes. P.Partovi-Azar, A.Namiranian: Journal of Physics - Conference Series, 2010, 248, 012010