Elastic properties of boron nitride nanotubes and their comparison with carbon nanotubes

Santosh, Mogurampelly ; Maiti, Prabal K. ; Sood, A. K. (2009) Elastic properties of boron nitride nanotubes and their comparison with carbon nanotubes Journal of Nanoscience and Nanotechnology, 9 (9). pp. 5425-5430. ISSN 1533-4880

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Official URL: http://www.ingentaconnect.com/search/article?optio...

Related URL: http://dx.doi.org/10.1166/jnn.2009.1197

Abstract

Boron Nitride Nanotubes (BNNTs) have alternating boron and nitrogen atoms in graphite like network and are strongly polar in nature due to a large charge on boron and nitrogen atoms. Hence electrostatic interactions are expected to play an important role in determining the elastic properties of BNNTs. In the absence of specific partial atomic charge information for boron and nitrogen, we have studied the elastic properties BNNTs varying the partial atomic charges on boron and nitrogen. We have computed Young modulus (Y) and Shear modulus (G) of BNNT as a function of the tube radius and number of walls using molecular mechanics calculation. Our calculation shows that Young modulus of BNNTs increases with increase in magnitude of the partial atomic charge on B and N and can be larger than the Young modulus of CNTs of same radius. This is in contrast to the earlier finding that CNTs has the largest tensile strength (PRL, 80, 4502, 1998). Shear modulus, on the other hand depends weakly on the magnitude of partial atomic charge and is less than the shear modulus of the CNT. The values obtained for Young modulus and Shear modulus are in excellent agreement with the available experimental results.

Item Type:Article
Source:Copyright of this article belongs to American Scientific Publishers.
Keywords:Boron Nitride Nanotube; Young Modulus; Shear Modulus; Molecular Mechanics
ID Code:54807
Deposited On:12 Aug 2011 12:52
Last Modified:12 Aug 2011 12:52

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