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Vertically aligned carbon nanotubes are synthesized with high density on a large area of cobalt-deposited silicon oxide substrate by thermal chemical vapor deposition of acetylene at 950 o C. The diameters of the carbon nanotubes are distributed in the range 80-120 nm and the length is about 20 μm. The carbon nanotubes have a bamboo-like structure in which the curvature of the compartment...
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