Nano Archive

Anomalous Young's modulus of a nanotube

Ouyang, G. and Li, X. L. and Tan, X. and Yang, G. W. (2007) Anomalous Young's modulus of a nanotube. PHYSICAL REVIEW B, 76 (19).

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Official URL: http://link.aps.org/doi/10.1103/PhysRevB.76.193406

Abstract

An analytic theory has been developed to predict and explain the mechanical responses of nanotubes (NTs) as their structure changes from the perspective of thermodynamics and continuum medium mechanics. It was found that the surface energy of the inner surface increases while the surface energy of outer surface decreases with decreasing diameter of NTs, which leads to the anomalous behavior of Young's modulus of NT that increases with decreasing diameter. For the same material, the Young's modulus of NT with thin shell is higher than that of one with thick shell, the Young's modulus of NT is higher than that of nanowire (NW) with the same size, and both of the Young's moduli of NT and NW are larger than that of bulk. Theoretical predictions are consistent with experiments.

Item Type:Article
Subjects:Physical Science > Nanophysics
Material Science > Functional and hybrid materials
Engineering > Nanotechnology applications in mechanical engineering
ID Code:2447
Deposited By:Farnush Anwar
Deposited On:09 Jan 2009 12:38
Last Modified:22 Jan 2009 16:05

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