Journal
APPLIED PHYSICS LETTERS
Volume 77, Issue 21, Pages 3468-3470Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1317534
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Carbon nanotubes grown on a Ni substrate and an Fe-Ni-Cr alloy substrate by plasma-enhanced chemical vapor deposition were investigated by transmission electron microscope (TEM) and energy dispersive x-ray (EDX) analysis. TEM showed that the nanotubes on both substrates have a piled-cone structure with metal particles on top which determine the diameter of the nanotubes. Their diameter ranges from 60 to 80 nm. Moreover, EDX showed that the metal particles are composed of Ni when the nanotubes are grown on Ni substrate and of Fe and Ni in the case of the Fe-Ni-Cr alloy substrate. (C) 2000 American Institute of Physics. [S0003-6951(00)04541-1].
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