TY - JOUR
T1 - Theoretical comparison between field emission from single-wall and multi-wall carbon nanotubes
AU - Mayer, Alexandre
AU - Miskovsky, N.M.
AU - Cutler, P.H.
PY - 2002
Y1 - 2002
N2 - We present three-dimensional simulations of field emission from single-wall and multi-wall carbon nanotubes. The structures considered are the metallic ideally open (5,5), (10,10), (15,15) and (5,5)@(10,10)@(15,15) nanotubes. For the multi-wall structure, flat and convex terminations are considered. The scattering calculations are achieved using a transfer-matrix methodology and band-structure effects result from using pseudopotentials and repeating periodically a basic unit of the nanotubes. The electronic emission from the single-wall nanotubes considered is found to decrease linearly with the radius of the tube. Multi-wall nanotubes are better emitters than single walls, the current extracted from multi-wall structures being higher than the total current obtained by considering their single-wall layers separately. The current emitted from a multi-wall structure is still increased when the termination is convex (instead of flat). The reduced polarizability of multi-wall nanotubes (compared to single-wall structures) is an important aspect for explaining their field-emission properties.
AB - We present three-dimensional simulations of field emission from single-wall and multi-wall carbon nanotubes. The structures considered are the metallic ideally open (5,5), (10,10), (15,15) and (5,5)@(10,10)@(15,15) nanotubes. For the multi-wall structure, flat and convex terminations are considered. The scattering calculations are achieved using a transfer-matrix methodology and band-structure effects result from using pseudopotentials and repeating periodically a basic unit of the nanotubes. The electronic emission from the single-wall nanotubes considered is found to decrease linearly with the radius of the tube. Multi-wall nanotubes are better emitters than single walls, the current extracted from multi-wall structures being higher than the total current obtained by considering their single-wall layers separately. The current emitted from a multi-wall structure is still increased when the termination is convex (instead of flat). The reduced polarizability of multi-wall nanotubes (compared to single-wall structures) is an important aspect for explaining their field-emission properties.
U2 - 10.1103/PhysRevB.65.155420
DO - 10.1103/PhysRevB.65.155420
M3 - Article
SN - 1098-0121
VL - 65
SP - 155420
JO - Physical Review. B, Condensed Matter and Materials Physics
JF - Physical Review. B, Condensed Matter and Materials Physics
IS - 15
ER -