Influence of Homogeneous Interfaces on the Strength of 500 nm Diameter Cu Nanopillars

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Interfaces play an important role in crystalline plasticity as they affect strength and often serve as obstacles to dislocation motion. Here we investigate effects of grain and nanotwin boundaries on uniaxial strength of 500 nm diameter Cu nanopillars fabricated by e-beam lithography and electro-plating. Uniaxial compression experiment's reveal that strength is lowered by introducing grain boundaries and significantly rises when twin boundaries are present. Weakening is likely due to the activation of grain-boundary-mediated processes, while impeding dislocation glide can be responsible for strengthening by twin boundaries.
Publisher
AMER CHEMICAL SOC
Issue Date
2011-04
Language
English
Article Type
Article
Keywords

NANOCRYSTALLINE NICKEL; MECHANICAL-PROPERTIES; DEFORMATION; PLASTICITY; STRAIN; GOLD

Citation

NANO LETTERS, v.11, no.4, pp.1743 - 1746

ISSN
1530-6984
DOI
10.1021/nl2003076
URI
http://hdl.handle.net/10203/187218
Appears in Collection
NE-Journal Papers(저널논문)
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