Journal
NANOSCALE
Volume 6, Issue 16, Pages 9574-9578Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr04731h
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Funding
- NSF through University of Pittsburgh [CMMI 0928517]
- Sandia National Lab
- U.S. Department of Energy [DE-AC04-94AL85000]
- Sandia Corporation
- 973 Program [2011CB933300]
- National Natural Science Foundation of China [51271134, J1210061]
- Fundamental Research Funds for the Central Universities
- CERS-China Equipment and Education Resources System [CERS-1-26]
- China Postdoctoral Science Foundation [2013M540602]
- Chinese Scholarship Council
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By employing the in situ transmission electron microscopy (TEM) technique, tensile deformation behaviors of a silver nanowire (NW) with a single twin structure were studied. Our observations revealed that the initial stage of plastic deformation was dominated by surface-mediated partial dislocation activities. Strikingly, the void formation and growth were shown to govern the later stage of plasticity, leading to the ductile type of fracture in NWs. Possible void nucleation and growth mechanisms were discussed. Additionally, TEM images show the transformation from bi-crystal to polycrystal in the fracture area, likely due to the void activity. Our results have implications in the assembly of functional structures applying nano-building blocks.
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