Simulating the Electron Transmission with Different Defective Carbon Nano-tubes

R. Nizama, S.M.A. Rizvib and A. Azamc aCentre of Excellence in Material Science, Applied Physics Aligarh Muslim University, Aligarh, India bDepartment of Mechanical Engineering, Aligarh Muslim University, Aligarh, India cCentre of Nanotechnology, King Abdulaziz, Kingdom of Saudi Arabia

Received: September 5, 2011; revised version February 29, 2012; in final form March 29, 2012

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2. The transmissions of forty-eight carbon nano-tube geometries to form: twenty-four intramolecular junctions between every two carbon nano-tubes and two simple carbon nano-tubes are also taken for investigating numerically. These forty-eight carbon nano-tubes form three different kinds of intramolecular junctions, which mean that each sixteen carbon nano-tubes are identical to either sixteen carbon nano-tubes in all respect, except three different intramolecular junctions in between them. The three intramolecular junctions, named as circumferential defective carbon nano-tubes, grouped defective carbon nano-tubes and distributed defective carbon nano-tubes. The nature of electronic states at the interfaces and in the semiconductor section is analyzed with the help of tight-binding method. These quantum transmissions have been compared among the different defective carbon nano-tubes and have been correlated with the pentagon and heptagon that formed in the intramolecular junction. It has been simulated that each pair of semiconductor-semiconductor carbon nano-tubes, semiconductor-metallic carbon nano-tubes and metallic-metallic carbon nano-tubes transmission affect on the presence of junctions pentagons-heptagons. The least deviations transmission is observed in the circumferential defective carbon nano-tubes rather than in other two and the maximum deviations are seen in the grouped defective carbon nano-tubes irrespective of the joining of the carbon nano-tube interface.

DOI: 10.12693/APhysPolA.122.190 PACS numbers: 73.22.-f