Angular distribution of carbon ion flux in a nanotube array during the plasma process by the Monte Carlo technique
- Plasma Nanoscience, School of Physics, University of Sydney, Sydney, New South Wales 2006 (Australia)
Angular distribution of microscopic ion fluxes around nanotubes arranged into a dense ordered pattern on the surface of the substrate is studied by means of multiscale numerical simulation. The Monte Carlo technique was used to show that the ion current density is distributed nonuniformly around the carbon nanotubes arranged into a dense rectangular array. The nonuniformity factor of the ion current flux reaches 7 in dense (5x10{sup 18} m{sup -3}) plasmas for a nanotube radius of 25 nm, and tends to 1 at plasma densities below 1x10{sup 17} m{sup -3}. The results obtained suggest that the local density of carbon adatoms on the nanotube side surface, at areas facing the adjacent nanotubes of the pattern, can be high enough to lead to the additional wall formation and thus cause the single- to multiwall structural transition, and other as yet unexplained nanoscience phenomena.
- OSTI ID:
- 21069930
- Journal Information:
- Physics of Plasmas, Vol. 14, Issue 11; Other Information: DOI: 10.1063/1.2806329; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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