Nucleation of Dislocations in 3.9 nm Nanocrystals at High Pressure

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As circuitry approaches single nanometer length scales, it has become important to predict the stability of single nanometer-sized metals. The behavior of metals at larger scales can be predicted based on the behavior of dislocations, but it is unclear if dislocations can form and be sustained at single nanometer dimensions. Here, we report the formation of dislocations within individual 3.9 nm Au nanocrystals under nonhydrostatic pressure in a diamond anvil cell. We used a combination of x-ray diffraction, optical absorbance spectroscopy, and molecular dynamics simulation to characterize the defects that are formed, which were found to be surface-nucleated partial dislocations. These results indicate that dislocations are still active at single nanometer length scales and can lead to permanent plasticity.
Publisher
AMER PHYSICAL SOC
Issue Date
2020-03
Language
English
Article Type
Article
Citation

PHYSICAL REVIEW LETTERS, v.124, no.10

ISSN
0031-9007
DOI
10.1103/PhysRevLett.124.106104
URI
http://hdl.handle.net/10203/273882
Appears in Collection
ME-Journal Papers(저널논문)
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