Abstract
Individually isolated single-walled carbon nanotubes (SWNTs) have been successfully grown vertically on a substrate by chemical vapor deposition with methane and Fe or Co catalysts. Vertical growth is obtained when the growth temperature was high, 900–1000°C, and the tube diameter is large, 2–5 nm. Vertically grown SWNTs are short, ranging from several tens to 300 nm, which are useful for use as tips of a field emission or probe microscope. Fullerene encapsulation has been achieved directly in vertical SWNTs on a substrate.
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