(a) Setups for the MEAD, cathode diameter of 0.5 in. and anode diameter of 0.25 in.; (b) photograph of the setup; (c) scheme of the anodic arc discharge, ablated flux, and helium supply for SWCNT synthesis.
SEM images of the carbon deposit produced: (a) without magnetic field and (b) with magnetic field, , applied to the anodic arc discharge.
(a) TEM image of the bundle of SWCNTs at high magnification, (b) TEM image of the bundle of CNTs and individual nanotube in parallel to the bundle at lower magnification, and (c) SEM image of the large bundle of SWCNTs.
Distribution of nondimensional SWNT lengths/nanotube length in deposits produced with and without magnetic field. The magnetic field is 0.4 T.
SWNT charge as a function of electron density in plasma calculated by the model of SWCNT/plasma interaction.
SWNT on the metal catalyst particle in plasma. In the practically interesting condition of large sheath , the shape of the sheath weakly depends on the SWNT length. Electric field is applied between SWNT/C and plasma bulk border. Carbon ion flux is mainly deposited on SWNT tip and on catalyst particle.
Growth of SWNT on the molten metal catalyst particle in plasma. Carbon flux from plasma is nonuniformly distributed about SWNT and catalyst particle surface. Carbon adatoms diffuse to the catalyst end and then incorporate into the SWNT structure through the molten catalyst shell. The SWNT diameter is determined by the size of the molten catalyst core.
Distribution of carbon ion flux on SWNT/C surfaces with plasma density and SWNT length as parameters. The SWNT lengths are (a) and (b) , the diameter is 2 nm, and the catalyst particle diameter is 10 nm.
Dependence of ratio of the carbon flux through catalyst to the total flux of carbon ions deposited on the SWNT surface on plasma density, with the SWNT length as a parameter. The SWNT diameter is 2 nm and the catalyst particle diameter is 10 nm. No evaporation from surface of molten catalyst shell.
Dependence of SWNT growth rate on the nondimensional nanotube length/nanotube length with plasma density as a parameter. The SWNT diameter is 2 nm and the catalyst particle diameter is 10 nm. The graph shows a strong decrease in the SWNT growth rate with the SWNT length.
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