The geometric structure of carbon nanotubes (CNTs) is introduced,the symmetry of zigzag and armchair CNTs is analyzed and these symmetry elements are abstracted and summarized.

• 在讨论了碳纳米管的几何结构的基础上,对齿型和椅型碳纳米管的对称性进行了分析并将这些对称元进行了抽象和总结。