Growth of Bamboo-Shaped Carbon Nanostructures on Carbon Fibre by Chemical Vapor Deposition

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Bamboo-shaped Carbon Nanostructures (BSCNs) and carbon nanofilaments (CNFs) have been successfully grown on carbon fibre coated with iron catalyst by chemical vapour deposition of ethene (C2H4). The reaction was carried out at 800°C with varied hydrogen and ethene ratios of 20/80, 50/50 and 80/20. TEM analysis showed the bamboo-shaped carbon nanostructures were best grown at 50/50 of hydrogen and ethene ratio, whilst disorder carbon nanofibres were grown when the ratio increased to 80/20, and less or no carbon nanofibres were observed at hydrogen and ethane ratio of 20/80 due to inactive of catalyst particle. The outer diameter of BSCNs consisting of hollow compartment was in the range of 40 ~ 48 nm and encapsulated catalyst particle were not observed at the tip or in the middle, indicating a bottom-growth. The formation of compartment was dependent on diffusion of carbon atom in the catalyst and the possible growth mechanism is explained.

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December 2013

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