Multi-walled carbon nanotubes (MWCNTs) were synthesized on uniform new-diamond film by decomposing methane at 900 °C with chemical vapor deposition technique. Based on various spectroscopic characterizations, such as scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy, a reasonable growth mechanism of MWCNTs was proposed. The metal-free prepared MWCNTs are easy to be purified and will have broad applications in material sciences.
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Wang et al. (2010) studied this question.
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