赤热石墨棒在乙醇中快速淬火制备多壁碳纳米管

Carbon nanotubes synthesized by rapid quenching of red-hot graphite rod in ethyl alcohol

为了满足各种纳米电子学应用的需求，发展新的制备碳纳米管的方法引起人们特别的关注。最近，作者研究了乙醇催化化学气相沉积法来制备多壁碳纳米管。然而，这种方法需要使用金属催化剂，这使得产物中带有杂质。提出了一种采用将赤热石墨棒在乙醇中快速淬火制备多壁碳纳米管的方法，利用这种方法制备的碳纳米管没有催化剂杂质。利用高分辨透射电子显微术对制备的碳纳米管进行了表征。实验结果表明，制备的产物是多壁碳纳米管。由于这种方法制备碳纳米管不需要催化剂，因此它是一种经济的制备碳纳米管的方法。

In order to meet the requirements of various applications, considerable efforts have been focused on the new approaches for synthesizing carbon nanotubes. Recently, simple thermal chemical vapor deposition growth technique by pyrolyzing ethyl alcohol has been developed. However, this method needs metallic catalyst. Here, we demonstrate that it is possible to synthesize multi-walled carbon nanotubes without the aid of any catalyst. The as-synthesized products were analyzed by high-resolution transmission electron microscopy （HRTEM）. The HRTEM images show that the products are multi-walled carbon nanotubes. The synthesis technique of carbon nanotubes is cost-effective because of the catalyst-free process.