Unzipping Carbon Nanotubes to Sub-5-nm Graphene Nanoribbons on Cu(111) by Surface Catalysis

作者：Dong, Wenjie; Li, Xin; Lu, Shuai; Li, Jie; Wang, Yansong; Zhong, Mingjun; Dong, Xu; Xu, Zhen; Shen, Qian; Gao, Song; Wu, Kai; Peng, Lian-Mao; Hou, Shimin^*; Zhang, Zhiyong^*; Zhang, Yajie^*; Wang, Yongfeng^*

来源：Small, 2023.

DOI：10.1002/smll.202308430

• annealing
• carbon nanotubes
• graphene nanoribbons
• scanning tunneling microscopy

Graphene nanoribbons (GNRs) are promising in nanoelectronics for their quasi-1D structures with tunable bandgaps. The methods for controllable fabrication of high-quality GNRs are still limited. Here a way to generate sub-5-nm GNRs by annealing single-walled carbon nanotubes (SWCNTs) on Cu(111) is demonstrated. The structural evolution process is characterized by low-temperature scanning tunneling microscopy. Substrate-dependent measurements on Au(111) and Ru(0001) reveal that the intermediate strong SWCNT-surface interaction plays a pivotal role in the formation of GNRs. @@@ A novel approach is reported to facilely prepare graphene nanoribbons (GNRs) through the simple annealing of single-walled carbon nanotubes (SWCNTs) on Cu(111). The surface-catalyzed unzipping of SWCNTs occurs along a longitudinal line which directly contacts with Cu(111), affording straight GNRs. The structural evolution process is characterized by low-temperature scanning tunneling microscopy with atom resolution.image

• 单位
  北京大学