scholarly journals Band gap opening and semiconductor–metal phase transition in (n, n) single-walled carbon nanotubes with distinctive boron–nitrogen line defect

2016 ◽  
Vol 18 (6) ◽  
pp. 4643-4651 ◽  
Author(s):  
Ming Qiu ◽  
Yuanyuan Xie ◽  
Xianfeng Gao ◽  
Jianyang Li ◽  
Yelin Deng ◽  
...  
Keyword(s):  
Phase Transition ◽  
Carbon Nanotubes ◽  
Band Gap ◽  
Single Walled Carbon Nanotubes ◽  
Line Defect ◽  
New Class ◽  
Gap Opening ◽  
Metal Phase Transition ◽  
Walled Carbon Nanotubes ◽  
Boron Nitrogen

A new class of semiconducting armchair SWCNTs with a distinctive BN line defect are investigated for the band gap opening, continuous mechanical and electrical modulating.

Band-Gap Opening in Metallic Single-Walled Carbon Nanotubes by Encapsulation of an Organic Salt

2017 ◽  
Vol 129 (40) ◽  
pp. 12408-12412
Author(s):  
Belén Nieto-Ortega ◽  
Julia Villalva ◽  
Mariano Vera-Hidalgo ◽  
Luisa Ruiz-González ◽  
Enrique Burzurí ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Band Gap ◽  
Single Walled Carbon Nanotubes ◽  
Organic Salt ◽  
Single Walled Carbon ◽  
Gap Opening ◽  
Walled Carbon Nanotubes

Band-Gap Opening in Metallic Single-Walled Carbon Nanotubes by Encapsulation of an Organic Salt

2017 ◽  
Vol 56 (40) ◽  
pp. 12240-12244 ◽  
Author(s):  
Belén Nieto-Ortega ◽  
Julia Villalva ◽  
Mariano Vera-Hidalgo ◽  
Luisa Ruiz-González ◽  
Enrique Burzurí ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Band Gap ◽  
Single Walled Carbon Nanotubes ◽  
Organic Salt ◽  
Single Walled Carbon ◽  
Gap Opening ◽  
Walled Carbon Nanotubes

scholarly journals Role of constituents for the chirality isolation of single-walled carbon nanotubes by the reversible phase transition of a thermoresponsive polymer

RSC Advances ◽  
2020 ◽  
Vol 10 (41) ◽  
pp. 24570-24576
Author(s):  
Eriko Shimura ◽  
Tomomi Tanaka ◽  
Yuki Kuwahara ◽  
Takeshi Saito ◽  
Toshiki Sugai ◽  
...  
Keyword(s):  
Phase Transition ◽  
Carbon Nanotubes ◽  
Single Walled Carbon Nanotubes ◽  
Sodium Borate ◽  
Thermoresponsive Polymer ◽  
Experimental Conditions ◽  
Reversible Phase Transition ◽  
Walled Carbon Nanotubes ◽  
Reversible Phase

Optimized experimental conditions in the presence of sodium borate achieved the selective release of (6,4) nanotubes into the liquid phase.

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.

A symmetry based investigation of the band gap of SWCNTs

Open Physics ◽  
2008 ◽  
Vol 6 (4) ◽  
Author(s):  
Mehdi Pakkhesal ◽  
Rahim Ghayour
Keyword(s):  
Carbon Nanotubes ◽  
Band Gap ◽  
Nearest Neighbors ◽  
Single Walled Carbon Nanotubes ◽  
Computational Effort ◽  
Lower Number ◽  
The Real ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

AbstractIn this paper we use symmetry of Single Walled Carbon Nanotubes (SWCNTs) to generate some types of virtual sub-bands that are lower in number than the real sub-bands obtained through conventional-TB. It is shown that the virtual sub-bands maintain the value of band gap. In obtaining the sub bands, the interactions of the nearest and the second and third-nearest neighbors are taken into account. As the consequence of lower number of sub-bands, a significant reduction in computational effort has occurred and made the approach useful.

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