Journal
JAPANESE JOURNAL OF APPLIED PHYSICS
Volume 47, Issue 4, Pages 1949-1951Publisher
IOP PUBLISHING LTD
DOI: 10.1143/JJAP.47.1949
Keywords
carbon nanocoil; chemical vapor deposition; multiwalled carbon nanocoil; base growth; growth mechanism
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Multiwalled carbon nanocoils (CNCs) have been synthesized by a method of thermal chemical vapor deposition (CVD) using a codeposited thin film consisting of Fe and Sn as catalysts. It has been found that the multiwalled CNCs are thinner and have a higher crystallinity than conventional CNCs. The catalyst particles are observed at the roots of CNCs, with diameters much larger than the line diameters of the coils. These large particles are formed by the aggregation of Sn and Fe reduced by the C2H2 gas in CVD. These results indicate that Sn plays a crucial role in the growth of the multiwalled CNCs, and a base growth mechanism that differs from conventional growth mechanisms has been experimentally observed and analyzed.
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