Nano Research

, Volume 4, Issue 12, pp 1261–1267 | Cite as

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

  • Yang Lu
  • Jun Song
  • Jian Yu Huang
  • Jun LouEmail author
Research Article


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. Open image in new window


Nanowires in situ transmission electron microscope (TEM) mechanical characterization dislocation nucleation plasticity 


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Copyright information

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  1. 1.Department of Mechanical Engineering & Materials ScienceRice UniversityHoustonUSA
  2. 2.Department of Mining & Materials EngineeringMcGill UniversityMontrealCanada
  3. 3.Center for Integrated Nanotechnologies (CINT)Sandia National LaboratoriesAlbuquerqueUSA

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