期刊
CARBON
卷 50, 期 12, 页码 4588-4595出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2012.05.044
关键词
-
资金
- Research Center for the Exotic NanoCarbon Project under the Japan Regional Innovation Strategy Program by Excellence, JST
- MEXT [24310088]
Metallic-impurity-free, nano-sized, short multi-walled carbon nanotubes (MWCNTs) in the form of a tape have been synthesized using stabilized arc discharge under atmospheric conditions. The long, thin tape consisted of crystalline MWCNTs exhibiting indiscernibly blurred interior lattice images and a narrow, hollow core, as well as small and large nanoparticles. The disordered interior regions of the tubes were enlarged into hollow cores by thermal treatment at 2000 degrees C suggesting that the elongated tubes crystallize via a supercooling process. The proposed macroscopic model for the growth process of the tubes in the arc resembles the fiber formation of a recently reported electrospinning process; thermally activated carbon ion and vapor create viscous carbon clusters, and the built-up charge in the clusters leads to the elongation into tubules. (C) 2012 Elsevier Ltd. All rights reserved.
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