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Characterization of surface and nonlinear elasticity in wurtzite ZnO nanowires

Abstract : Surface elasticity and nonlinear effects are reported in ZnO nanowires and characterized by ab initio calcu- lations. Fully anisotropic elastic and stress coefficients related to (10 10) surfaces are provided and used to construct a continuum model of nanowires based on the Gurtin-Murdoch surface elasticity theory, able to capture mechanical size effects. Nonlinear elasticity is observed through non-zero third order energy deriva- tive terms with respect to axial strain in the direction of the nanowire. The associated material parameters are found to be themselves size-dependent.
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Submitted on : Tuesday, June 26, 2012 - 11:54:16 PM
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Julien Yvonnet, Alexander Mitrushchenkov, Gilberte Chambaud, Qi-Chang He, S.-T. Gu. Characterization of surface and nonlinear elasticity in wurtzite ZnO nanowires. Journal of Applied Physics, American Institute of Physics, 2012, 111 (-), pp.124305. ⟨10.1063/1.4729545⟩. ⟨hal-00711329⟩



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