Nano Archive

Mechanical and electronic properties of a C/BN nanocable under tensile deformation

Enyashin, Andrey N. and Ivanovskii, A. L. (2005) Mechanical and electronic properties of a C/BN nanocable under tensile deformation. Nanotechnology, 16 (8). pp. 1304-1310.

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Atomistic simulations are performed to investigate the structural, mechanical and electronic properties of a coaxial C/BN nanocable under axial elongation using molecular dynamics. Our results show that the mechanism of the breaking process essentially differs from those for initial single-walled carbon and BN nanotubes. The formation of a carbon as well as a~-C-B-N-~atomic chain connecting two cable fragments before fracture is obtained, and due to such bridges the cable can be stretched until complete rupture up to emax[?]29% as compared with emax[?]23% for a single-walled carbon nanotube. After breakage the opposite tips of cable fragments form different individual atomic morphologies and compositions and can have promising potential as electron emitters. The Young moduli of the C/BN cable and C-NT are comparable. An analysis of the electronic structure shows that during tensile deformation the C/BN cable retains the basic electronic characteristics (metallic-like for the inner carbon nanotube and dielectric for the outer BN tube); however, the bandgap between the highest occupied N~2p and lowest unoccupied B~2p states decreases from 4.0 to 1.2~eV.

Item Type:Article
ID Code:661
Deposited By:Prof. Alexey Ivanov
Deposited On:16 Mar 2009 10:41
Last Modified:26 Mar 2009 14:25

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