物理化学学报 >> 2001, Vol. 17 >> Issue (08): 687-691.doi: 10.3866/PKU.WHXB20010804

研究论文 上一篇    下一篇

单壁碳纳米管短管的制备

魏忠;陈言;刘忠范   

  1. 北京大学化学与分子工程学院 纳米科学与技术研究中心,北京 100871
  • 收稿日期:2001-02-13 修回日期:2001-03-19 发布日期:2001-08-15
  • 通讯作者: 刘忠范 E-mail:lzf@chem.pku.edu.cn

Preparation of Short Single Walled Carbon Nanotubes by CVDGrowth and by Chemical Oxidation

Wei Zhong;Chen Yan;Liu Zhong-Fan   

  1. Center of Nanoscale Science and Technology, College of Chemistry &Molecular Engineering, Peking University, Beijing 100871
  • Received:2001-02-13 Revised:2001-03-19 Published:2001-08-15
  • Contact: Liu Zhong-Fan E-mail:lzf@chem.pku.edu.cn

摘要: 分别通过控制CVD生长时间的方法和在混合的硝酸硫酸中超声氧化碳纳米管的化学剪裁法制备了单壁碳纳米管短管.两种方法都能将大多数碳纳米管的长度控制在500 nm以下.拉曼光谱结果表明: 在化学剪裁过程中,单壁碳纳米管部分被破坏产生无定形碳杂质;用控制CVD反应时间得到的单壁碳纳米管短管样品比长时间反应得到的长管样品杂质少,且不存在后处理时碳纳米管的破损问题,其纯度比化学剪裁法得到的产品纯度高.

关键词: 单壁碳纳米管, 化学气相沉积(CVD), 拉曼光谱, 原子力显微镜(AFM)

Abstract: Short single walled carbon nanotubes (SWNTs) were prepared by shortening CVD growth time and by postsynthesis chemical oxidation with ultrasonication. Most of the SWNTs could be controlled to be shorter than 500 nm by both the two methods. However, Raman spectra show that shortening CVD time results in the decrease of amorphous carbon impurities, but in the oxidation process the damage of SWNTs occurred and amorphous carbon impurities increased. The short SWNTs directly synthesized by CVD have higher purity than that by chemical oxidation.

Key words: Single walled carbon nanotubes, CVD, Raman, AFM