Fe–Sapphire and C–Fe–Sapphire Interactions and Their Effect on the Growth of Single-Walled Carbon Nanotubes by Chemical Vapor Deposition
We previously reported that the quantity of single-walled carbon nanotubes grown on Fe-coated sapphire by chemical vapor deposition depended on the crystallographic faces of sapphires. In this report, we show that the interaction of Fe, sapphire, and carbon depended on the sapphire faces. We deduce that the quantity of Fe available to catalyze the growth of single-walled carbon nanotubes was suppressed by the formation of Fe–Al alloys and whether the Fe–Al alloys were formed on Fe-coated sapphire or not depended on the sapphire-surface structure.
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Document Type: Research Article
Publication date: 2004-04-01
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