We employ three dimensional x-ray coherent diffraction imaging to map the lattice strain distribution, and to probe the elastic properties of a single crystalline Ni (001) nanowire grown vertically on an amorphous substrate. The reconstructed density maps show that with increasing wire width, the equilibrium compressive stress in the core region decreases sharply while the surface tensile strain increases, and gradually trends to a nonzero constant. We use the retrieved projection of lattice distortion to predict the Young’s Modulus of the wire based on the elasticity theory.
Probing the three-dimensional strain inhomogeneity and equilibrium elastic properties of single crystal Ni nanowires
E. Fohtung, J. W. Kim, Keith T. Chan, Ross Harder, Eric E. Fullerton, O. G. Shpyrko; Probing the three-dimensional strain inhomogeneity and equilibrium elastic properties of single crystal Ni nanowires. Appl. Phys. Lett. 16 July 2012; 101 (3): 033107. https://doi.org/10.1063/1.4737440
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