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Research Article | Open Access

Mechanical Properties of ZnO Nanowires Under Different Loading Modes

Feng Xu1Qingqun Qin1Ashish Mishra2Yi Gu2Yong Zhu1( )
Department of Mechanical and Aerospace EngineeringNorth Carolina State UniversityRaleigh, North Carolina27695USA
Department of Physics and AstronomyWashington State UniversityPullman, Washington99164USA
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Abstract

A systematic experimental and theoretical investigation of the elastic and failure properties of ZnO nanowires (NWs) under different loading modes has been carried out. In situ scanning electron microscopy (SEM) tension and buckling tests on single ZnO NWs along the polar direction [0001] were conducted. Both tensile modulus (from tension) and bending modulus (from buckling) were found to increase as the NW diameter decreased from 80 to 20 nm. The bending modulus increased more rapidly than the tensile modulus, which demonstrates that the elasticity size effects in ZnO NWs are mainly due to surface stiffening. Two models based on continuum mechanics were able to fit the experimental data very well. The tension experiments showed that fracture strain and strength of ZnO NWs increased as the NW diameter decreased. The excellent resilience of ZnO NWs is advantageous for their applications in nanoscale actuation, sensing, and energy conversion.

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Nano Research
Pages 271-280
Cite this article:
Xu F, Qin Q, Mishra A, et al. Mechanical Properties of ZnO Nanowires Under Different Loading Modes. Nano Research, 2010, 3(4): 271-280. https://doi.org/10.1007/s12274-010-1030-4

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Received: 30 November 2009
Revised: 17 January 2010
Accepted: 08 February 2010
Published: 25 March 2010
© The Author(s) 2010

This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and source are credited.

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