物理化学学报 >> 1996, Vol. 12 >> Issue (10): 905-909.doi: 10.3866/PKU.WHXB19961009

研究论文 上一篇    下一篇

脉冲激光溅射下固液界面生长的碳纳米管及其机理初探

王育煌,张强,刘朝阳,黄荣彬,郑兰荪   

  1. 固体表面物理化学国家重点实验室,厦门大学化学系,厦门 361005
  • 收稿日期:1996-04-29 修回日期:1996-06-24 发布日期:1996-10-15
  • 通讯作者: 郑兰荪

Production of Carbon Nanotubes at Carbon/Water Interface by Pulsed-Laser Ablation

Wang Yu-Huang,Zhang Qiang,Liu Zhao-Yang,Huang Rong-Bin,Zheng Lan-Sun   

  1. Department of Chemistry,Xiamen University,Xiamen 361005
  • Received:1996-04-29 Revised:1996-06-24 Published:1996-10-15
  • Contact: Zheng Lan-Sun

摘要:

以脉冲激光束直接溅射浸在水中的单质碳样品,发现在固液界面也能产生碳纳米管.实验还发现碳纳米管的形成与样品的结构有密切的关联:石墨的层状结构越完整,碳纳米管的形成越容易,而且石墨层面相对于激光束的取向也会显著地影响碳纳米管的生成.通过对实验结果的分析,探讨了激光液相溅射产生碳纳米管的机理,认为激光溅射产生的碳蒸气被水束缚在固液的界而内,而完整的晶面使碳蒸气在界面内的分布具有准二维的性质,为碳纳米管的生长提供了较为理想的环境.

关键词: 碳纳米管, 激光溅射, 固液界面

Abstract:

 Carbon nanotubes have been produced by laser ablation of graphite sample immersed in water. The experiment reveals the dependence of nanotube production on the structures of the sample. The more perfect the layer structure of the graphite sample is the easier is the production of the carbon nanotubes. Production of the carbon nanotllbes is also affected by the orientation of the lattice surface of the graphite sample. Glassy carbon cannot produce nanotube at all. Based on careful analysis of the experimental results, mechanism for the production of carbon nanotubes on the carbon/water interface is suggested. Water on the sample quenches the laser-vaporized species on the surface of the sample so as to provide the reactive material for the growth of the nanotubes. The perfect crystal lattice on the graphite sample surface can distribute the vaporized material to be nearly two-dimensional and the environment favorites the production of the carbon nanotubes.

Key words: Carbon nanotubes, Laser ablation, Solid/liquid interface