User login

You are here

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

Yang Lu's picture

http://www.springerlink.com/content/y4228l3u78t38755/

 

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.

MediaObjects/12274_2011_177_Fig1_HTML.gif

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

AttachmentSize
PDF icon Lu_Nano_Research 2011.pdf564.75 KB

Comments

Yang Lu's picture

Subscribe to Comments for "Surface dislocation nucleation mediated deformation and ultrahigh strength in sub-10-nm gold nanowires"

Recent comments

More comments

Syndicate

Subscribe to Syndicate