中国物理B ›› 2002, Vol. 11 ›› Issue (5): 496-501.doi: 10.1088/1009-1963/11/5/316

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Morphologies and microstructures of carbon nanotubes prepared by self-sustained arc discharging

唐东升, 周维亚, 慈立杰, 闫小琴, 袁华军, 周振平, 梁迎新, 刘东方, 刘维   

  1. Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China
  • 收稿日期:2001-11-05 修回日期:2001-12-24 出版日期:2005-06-13 发布日期:2005-06-13

Morphologies and microstructures of carbon nanotubes prepared by self-sustained arc discharging

Tang Dong-Sheng (唐东升), Zhou Wei-Ya (周维亚), Ci Li-Jie (慈立杰), Yan Xiao-Qin (闫小琴), Yuan Hua-Jun (袁华军), Zhou Zhen-Ping (周振平), Liang Ying-Xin (梁迎新), Liu Dong-Fang (刘东方), Liu Wei (刘维)   

  1. Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100080, China
  • Received:2001-11-05 Revised:2001-12-24 Online:2005-06-13 Published:2005-06-13

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摘要： We have investigated the morphology and microstructure of carbon nanotubes and nanoparticles in cathode deposits prepared by self-sustained arc discharge. Scanning electron microscopy images indicate that there are two regions exhibiting different morphologies on the top surface of the cathode deposits. In the central region, there is a triangular pattern of spots with a diameter up to 100μm, which consists of carbon nanotubes and nanoparticles. In the fringe region, carbon nanotubes and nanoparticles are distributed randomly. In addition, carbon nanotubes in the central region have a larger inner diameter, compared with those in the fringe region. The outer diameter distribution of tubes in the central region is narrower than that of tubes in the fringe region, while the former has a smaller peak value than the latter. For the nanoparticles, they exhibit a different behaviour from the tubes existing in the same region. The difference between the microstructure of tubes or particles in the two regions is attributed to the different temperatures and temperature gradients during their formation.

Abstract: We have investigated the morphology and microstructure of carbon nanotubes and nanoparticles in cathode deposits prepared by self-sustained arc discharge. Scanning electron microscopy images indicate that there are two regions exhibiting different morphologies on the top surface of the cathode deposits. In the central region, there is a triangular pattern of spots with a diameter up to 100μm, which consists of carbon nanotubes and nanoparticles. In the fringe region, carbon nanotubes and nanoparticles are distributed randomly. In addition, carbon nanotubes in the central region have a larger inner diameter, compared with those in the fringe region. The outer diameter distribution of tubes in the central region is narrower than that of tubes in the fringe region, while the former has a smaller peak value than the latter. For the nanoparticles, they exhibit a different behaviour from the tubes existing in the same region. The difference between the microstructure of tubes or particles in the two regions is attributed to the different temperatures and temperature gradients during their formation.

Key words: carbon nanotube, arc discharge, microstructure

中图分类号:  (Structure of nanoscale materials)

  • 61.46.-w
52.80.Mg (Arcs; sparks; lightning; atmospheric electricity) 61.50.-f (Structure of bulk crystals) 81.07.Bc (Nanocrystalline materials) 61.72.Ff (Direct observation of dislocations and other defects (etch pits, decoration, electron microscopy, x-ray topography, etc.)) 68.37.Hk (Scanning electron microscopy (SEM) (including EBIC))