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Nano Lett. 2011 Aug 10;11(8):3151-5. doi: 10.1021/nl201233u. Epub 2011 Jul 22.

Approaching the theoretical elastic strain limit in copper nanowires.

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Institute of Microstructure and Properties of Advanced Materials, Beijing University of Technology, Beijing, China.


Three sets of uniaxial tensile tests have been performed in situ in transmission electron microscopy/high-resolution electron microscopy on Cu nanowires (NWs) to accurately map out the sample size dependence of elastic strain limit. Atomic-resolution evidence was obtained for an exceedingly large recoverable strain (as much as 7.2%) that can be sustained in the lattice of a single-crystalline Cu NW with a diameter of ∼5.8 nm. This ultrahigh elastic strain is consistent with the predictions from molecular dynamics simulations for nanowires and approaches the ideal elastic limit predicted for Cu by ab initio calculations.


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