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Catalytic metal-free formation of multi-walled carbon nanotubes in atmospheric arc discharge
- Source :
-
Carbon . Oct2012, Vol. 50 Issue 12, p4588-4595. 8p. - Publication Year :
- 2012
-
Abstract
- Abstract: 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°C, suggesting that the elongated tubes crystallize via a super-cooling 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. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00086223
- Volume :
- 50
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Carbon
- Publication Type :
- Academic Journal
- Accession number :
- 77733116
- Full Text :
- https://doi.org/10.1016/j.carbon.2012.05.044