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Chin. Phys. B, 2011, Vol. 20(8): 087303    DOI: 10.1088/1674-1056/20/8/087303
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

Dependence of the electrical properties of defective single-walled carbon nanotubes on the vacancy density

Li Feng-Yina, Luo Yu-Pinb, Tien Li-Ganc, Tsai Chuen-Horngc, Lee Ming-Hsiend
a Department of Chemistry, National Chung Hsing University, Taichung, Taiwan 420, China; b Department of Electronic Engineering, National Formosa University, Yunlin County, Taiwan 632, China; c Department of Engineering and System Science, National Tsing Hua University, Hsin Chu, Taiwan 300, China; d Department of Physics, Tamkang University, Tamsui, Taipei County, Taiwan 251, China
Abstract  The relationship between the electric properties and the vacancy density in single-walled carbon nanotubes has been investigated from first principles as well as the dependence of the influencing range of a vacancy in the nanotube on the nanotube chirality. Compared with the long-range interaction of the vacancies in a single-walled carbon nanotube with non-zero chiral angle, a much shorter interaction was found between vacancies in a zigzag single-walled carbon nanotube. In this study, we investigated the bandstructure fluctuations caused by the nanotube strain, which depends on both the vacancy density and the tube chirality. These theoretical results provide new insight to understand the relationship between the local deformation of a defective single-walled carbon nanotube and its measurable electronic properties.
Keywords:  chiral carbon nanotube      mono-vacancy defect      energy gap     
Received:  29 November 2010      Published:  15 August 2011
PACS:  73.22.-f (Electronic structure of nanoscale materials and related systems)  
  73.63.Fg (Nanotubes)  
  71.15.Mb (Density functional theory, local density approximation, gradient and other corrections)  

Cite this article: 

Luo Yu-Pin, Tien Li-Gan, Tsai Chuen-Horng, Lee Ming-Hsien, Li Feng-Yin Dependence of the electrical properties of defective single-walled carbon nanotubes on the vacancy density 2011 Chin. Phys. B 20 087303

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