Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5418113 | Journal of Molecular Structure: THEOCHEM | 2008 | 6 Pages |
Abstract
The structural, energetic and electronic features of asymmetric armchair single-walled carbon nanotube (SWCNT) junctions have been studied by ab initio calculations at the B3LYP/6-31Gâ//HF/3-21Gâ levels. The junctions are composed of two SWCNTs with different radius, which are connected by a set of 5-membered and 7-membered carbon rings. The results show that the metallic-metallic junction is more energetically favorable if the junction is formed with a hexagon inserted between the pentagon-heptagon (5/7) pair defects in the armchair nanotube. The shift of the spatial distribution of HOMO and LUMO shows that the asymmetric electronic structure of the junction could be used as a molecular rectifier.
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Authors
Yuanfeng Ye, Milin Zhang, Jianwei Zhao, Hongmei Liu, Nan Wang,