期刊
NANO RESEARCH
卷 15, 期 3, 页码 1709-1714出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-021-3819-8
关键词
armchair graphene nanoribbons; single-walled carbon nanotubes; Raman spectroscopy; diameter dependence; metallicity dependence
类别
资金
- National Natural Science Foundation of China [51902353]
- Guangdong Basic and Applied Basic Research Foundation [2019A1515011227]
- Science and Technology Innovation Strategy Special Fund of Guangdong Province [pdjh2020(b)0018]
- State Key Laboratory of Optoelectronic Materials and Technologies, U. K [OEMT-2021-PZ-02]
- DFG SPP Graphene
- DFG
- Ministry of Science, Research and the Arts (MWK) of Baden-Wuerttemberg
- Graphene Flagship
This study investigated the diameter-dependent synthesis of GNRs using SWCNTs of different average diameters, and found that the width of GNRs can be tailored by the diameter of SWCNTs. Particularly, SWCNTs with an average diameter of 1.3 nm produced the highest yield of 6 and 7 armchair GNRs, indicating potential for high-yield production of certain GNRs in large scale applications.
Sub-nanometer armchair graphene nanoribbons (GNRs) with moderate band gap have great potential towards novel nanodevices. GNRs can be synthesized in the confined tubular space of single-walled carbon nanotubes (SWCNTs), in which precursor molecules have been specifically designed to form the GNRs with certain width and edge. However, it is still unexplored how the diameter and metallicity of SWCNTs influence the synthesis of the GNRs. Herein, we applied a series of SWCNTs with different average diameters to study the diameter-dependent synthesis of GNRs. By using Raman spectroscopy and transmission electron microscopy, we found that the width of the GNRs can be tailored by the diameter of the SWCNTs. Especially, the SWCNTs with average diameter of 1.3 nm produced 6 and 7 armchair GNRs with the highest yield, which can be well explained by considering the width of the GNRs and van der Waals radius of hydrogen and carbon atoms. In addition, semiconducting and metallic SWCNTs produced GNRs with different yields, which could attribute to different diameter distributions and density of defects. These results enable the possibility of a high-yield production of certain armchair graphene nanoribbons in large scale, which would benefit future applications as semiconductor with sub-nanometer in width.
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