Journal
APPLIED PHYSICS LETTERS
Volume 77, Issue 17, Pages 2767-2769Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1319529
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The nucleation and growth of aligned multiwall carbon nanotubes by microwave plasma-enhanced chemical vapor deposition have been studied. The nanotubes nucleate and grow from catalytic cobalt islands on a silicon substrate surface, with both their diameter and length dependent on the size of the cobalt islands. Electron microscopy reveals that the nanotubes grow via a base growth mechanism. The nanotubes grow initially at a very rapid and constant rate (similar to 100 nm/s) that decreases sharply after the catalyst Co particles become fully encapsulated by the nanotubes. We propose a detailed model to explain these experimental observations on nucleation and growth of nanotubes. (C) 2000 American Institute of Physics. [S0003-6951(00)00443-5].
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