期刊
CARBON
卷 39, 期 11, 页码 1681-1687出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0008-6223(00)00301-8
关键词
carbon nanotubes; graphitization; X-ray diffraction; transmission electron microscopy (TEM)
In this work, we present a systematic study of the effects of graphitization on the structural perfection of multiwalled carbon nanotubes. High purity nanotubes were produced by a low temperature CVD method and subsequently annealed at temperatures between 1600 and 3000 degreesC. The nanotubes were characterized for chemical purity, interlayer spacing, and defect healing. The graphitization procedure was found to remove residual metal catalyst in the nanotubes and reduce the wall defects as reflected in a reduced interlayer spacing between the graphene shells. Graphitization presents a low-cost, commercially viable method of purifying and ordering multiwall carbon nanotubes. (C) 2001 Elsevier Science Ltd. All rights reserved.
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