A number of morphological features of multi-walled carbon nanotubes (MWCNTs) have been reported, as conducted through field emission scanning electron microscope and transmission electron microscope (TEM), which were synthesized by conventional arc discharge process. The observation of a classical variety of structural feature from TEM, some of them not reported before, has been used to make interpretation from existing growth models. Mechanism and kinetics of different types of multi-walled carbon nanotubes have been also discussed. Results indicated that formation of pentagonal, heptagonal and pentagonal-heptagonal carbon rings play vital role in the formation of Complex structure of multi-walled carbon nanotubes (MWCNTs).

多壁碳纳米管 (MWCNT) 的许多形态特征已被报道，如通过场发射扫描电子显微镜和透射电子显微镜 (TEM) 进行的，它们是通过常规电弧放电工艺合成的。从 TEM 观察到的各种经典结构特征，其中一些以前没有报道过，已被用来从现有的增长模型中进行解释。还讨论了不同类型的多壁碳纳米管的机理和动力学。结果表明，五边形、七边形和五边形-七边形碳环的形成在多壁碳纳米管（MWCNTs）复杂结构的形成中起着至关重要的作用。