Energy band structure effect of individual single-walled carbon nanotubes on field emission characteristics

2004 ◽  
Vol 344 (1-4) ◽  
pp. 243-248 ◽  
Author(s):  
Liu Xinghui ◽  
Zhu Changchun ◽  
Li Yukui
Keyword(s):  
Carbon Nanotubes ◽  
Band Structure ◽  
Field Emission ◽  
Energy Band ◽  
Single Walled Carbon Nanotubes ◽  
Energy Band Structure ◽  
Structure Effect ◽  
Emission Characteristics ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

Energy Band Calculation of Spiral Single-Walled Carbon Nanotubes

2012 ◽  
Vol 535-537 ◽  
pp. 341-344 ◽  
Author(s):  
Hong Xia Wang ◽  
Zi Biao Song ◽  
Dai Zhi Liu
Keyword(s):  
Carbon Nanotubes ◽  
Band Gap ◽  
Electron Energy ◽  
Energy Band ◽  
Structural Parameters ◽  
Tight Binding ◽  
Single Walled Carbon Nanotubes ◽  
Vector Equation ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

On the base of the electron energy band structure of graphene obtained by the tight-binding method, the quantized wave vector equation along the circumferential director of the spiral single-walled carbon nanotubes was established through coordinate transformation and periodic boundary condition, and an analytical expression of the electron energy band was derived. MATLAB is used to calculate the energy band curve of spiral single-walled carbon nanotubes with different structural parameters. The characteristic of the energy band curves was analyzed and discussed. The results shows that single-walled carbon nanotubes (n, m) can be identified as metallic with no band gap nearly which satisfies n-m=3q(q is integer), otherwise, the nanotubes is semiconducting and there are band gaps between conduction band and valence band. And the band gap is inversely proportional to diameter approximately for semiconducting tubes.

Sign in / Sign up

Export Citation Format

Share Document