Crystallographic order in multi-walled carbon nanotubes synthesized in the presence of nitrogen

被引:30
作者
Ducati, C
Koziol, K
Friedrichs, S
Yates, TJV
Shaffer, MS
Midgley, PA
Windle, AH
机构
[1] Univ Cambridge, Dept Mat Sci & Met, Cambridge CB2 3QZ, England
[2] Technol Partnership Plc, Melbourn SG8 6EE, Royston, England
[3] Univ London Imperial Coll Sci Technol & Med, Dept Chem, London SW7 2AZ, England
关键词
carbon nanotubes; crystal structure; electron microscopy; nitrogen;
D O I
10.1002/smll.200500513
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Multi-walled carbon nanotubes were synthesized by chemical vapor de position from pure toluene and toluene/diazine mixtures using ferrocene as a catalyst precursor at 760 degrees C As recently announced,([1]) characterization of the resulting nanotube films showed that, unlike pure carbon nanotubes, those grown in the presence of nitrogen have an extremely high degree of internal order, both in terms of the uniform chirality in the nanotube walls and of the crystallographic register between them. Here, the structure, defects, and morphology of the nanotubes were analyzed in depth using advanced electron microscopy techniques, and compared with existing models and observations. Nitrogen, which seems to be responsible for the dramatic structural order, was found to segregate preferentially within the core of the nanotubes.
引用
收藏
页码:774 / 784
页数:11
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