Nano Research

, Volume 4, Issue 12, pp 1261–1267

Surface dislocation nucleation mediated deformation and ultrahigh strength in sub-10-nm gold nanowires

Authors

  • Yang Lu
    • Department of Mechanical Engineering & Materials ScienceRice University
  • Jun Song
    • Department of Mining & Materials EngineeringMcGill University
  • Jian Yu Huang
    • Center for Integrated Nanotechnologies (CINT)Sandia National Laboratories
    • Department of Mechanical Engineering & Materials ScienceRice University
Research Article

DOI: 10.1007/s12274-011-0177-y

Cite this article as:
Lu, Y., Song, J., Huang, J.Y. et al. Nano Res. (2011) 4: 1261. doi:10.1007/s12274-011-0177-y

Abstract

The plastic deformation and the ultrahigh strength of metals at the nanoscale have been predicted to be controlled by surface dislocation nucleation. In situ quantitative tensile tests on individual 〈111〉 single crystalline ultrathin gold nanowires have been performed and significant load drops observed in stress-strain curves suggest the occurrence of such dislocation nucleation. High-resolution transmission electron microscopy (HRTEM) imaging and molecular dynamics simulations demonstrated that plastic deformation was indeed initiated and dominated by surface dislocation nucleation, mediating ultrahigh yield and fracture strength in sub-10-nm gold nanowires. https://static-content.springer.com/image/art%3A10.1007%2Fs12274-011-0177-y/MediaObjects/12274_2011_177_Fig1_HTML.gif

Keywords

Nanowiresin situ transmission electron microscope (TEM)mechanical characterizationdislocation nucleationplasticity

Supplementary material

12274_2011_177_MOESM1_ESM.pdf (366 kb)
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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2011