Growth Conditions for Carbon Nanotubes and Helical Nanofibers on Copper Substrates Using Sparked Catalysts

B. Toboonsung; Pisith Singjai

doi:10.4028/www.scientific.net/AMR.55-57.561

Paper Titles

Attachment of Metal Oxide Nanoparticles on Carbon Nanotubes with Different Oxidation Levels
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Microstructure and Characterizations of Portland-Carbon Nanotubes Pastes
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Mechanical Properties of Hemp Fiber Composites with Carbon Nanotubes Reinforcement
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The Diamond Crystal Nucleation by Combustion Activation CVD
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Growth Conditions for Carbon Nanotubes and Helical Nanofibers on Copper Substrates Using Sparked Catalysts
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Electronic Structure of Straight and T-Shape Singled-Wall Carbon Nanotube Junctions: A Molecular Quantum Mechanics Study
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Structural Evolution in the Processing of Fe/ BaFe₁₂O₁₉ Nano Composite via Mechanical Alloying
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Oxygen Control on Nanocrystal-AlON Films by Reactive Gas-Timing Technique R.F. Magnetron Sputtering and Annealing Effect
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Photocatalytic Decolorization of Red Dye in Aqueous ZnO-TiO₂ Suspensions
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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 55-57Growth Conditions for Carbon Nanotubes and Helical...

Growth Conditions for Carbon Nanotubes and Helical Nanofibers on Copper Substrates Using Sparked Catalysts

Abstract:

Carbon nanotubes (CNTs) and helical nanofibers (HNFs) were selectively grown on copper substrates by chemical vapor deposition using acetylene as a carbon source. The experiments were carried out by using Ni, Fe and Co as single and co-catalysts which were deposited onto the substrates by a sparking method. The catalyst-coated copper substrates were heated at 750°C in a mixed-gas-flowing tube furnace, at an argon flow rate of 100 ml/min and various acetylene flow rates of 3, 5 and 10 ml/min. The larger diameter of HNFs was grown only on Ni and Ni-Fe catalysts at the acetylene flow rates of 5 and 10 ml/min whereas the uniform smaller diameter of CNTs was preferentially grown on Fe-Co and Ni-Fe catalysts at the flow rate of 3 ml/min. We suggest that Co likely prevents the formation of HNFs whereas Ni promotes.