石墨烯-碳纳米管束二元相体系的发现及成因探讨

Discovery and the Reasons Discussed about Graphene-carbon Nanotube Bundle Binary Phase

在利用化学气相沉积法制备石墨烯的实验中发现了石墨烯与碳纳米管的二元相体系,这是世界上首次发现这一共存现象。经过微结构分析发现,石墨烯片层上集聚了具有非常平直边界的碳纳米管束,进一步发现既有单管束,还有双管束,但不存在单一结构的单壁或多壁碳纳米管。同时,还第一次发现了石墨烯片层上存在宽度为2~3 nm连续的碳原子面弯曲褶皱带,由此推断在形成石墨烯的过程中,部分石墨烯碎片在特定温度和催化剂条件下碳环卷曲形成碳纳米管,进一步构成碳纳米管束。

In graphene prepared by chemical vapor deposition method was found in the experiment of graphene and carbon nanotubes binary phase system, it is found for the first time this coexistence phenomenon in the world. Through the microstructure analysis found that graphene layers on offer the very straight boundary of the carbon nano tube bundle, further found that both the single tube bundle, and double tube bundle, but there is no single structure of single-walled and multi-walled carbon nanotubes. At the same time, also for the first time discovered the existence on the graphene layer width is 2 to 3 nm continuous bending fold belt of carbon atoms, thus infer that in the process of formation of graphene, some pieces of graphene in a specific temperature and catalyst under the condition of carbon nanotubes, carbon ring crimp further constitute a carbon nano tube bundle.