Publication Type
Journal
Journal Name
Nano Letters
Publication Date
Page Numbers
2383 to 2388
Volume
7
Issue
8
Abstract
The electronic properties of doped double-walled carbon nanotubes have been investigated using density functional theory and resonant Raman spectroscopy. Our first-principles calculations investigate the effects of doping on the M@S and S@M systems, where a metallic (M) tube is either inside or outside a semiconducting (S) one. The results show that metallic nanotubes are very sensitive to doping even when they are inner tubes, in sharp contrast to the fact that a semiconducting nanotube is not affected by doping when the outer shell is a metallic nanotube (screening effects). The theoretical predictions are in agreement with resonant Raman scattering data.
