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Helium Implantation Effects on the Compressive Response of Cu Nanopillars
Author(s) -
Guo Qiang,
Landau Peri,
Hosemann Peter,
Wang Yongqiang,
Greer Julia R.
Publication year - 2013
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201201614
Subject(s) - nanopillar , materials science , nanoscopic scale , helium , compression (physics) , fabrication , irradiation , nanotechnology , composite material , deformation (meteorology) , nanocrystal , yield (engineering) , nanostructure , chemistry , medicine , alternative medicine , physics , organic chemistry , pathology , nuclear physics
A fabrication methodology for 120 nm‐diameter, <111 > ‐oriented single crystalline Cu nanopillars which are uniformly implanted with helium is described. Uniaxial compression experiments reveal that their yield strength is 30% higher than that of their unimplanted counterparts. This study sheds light on the fundamental understanding of the deformation mechanism of irradiated metallic nanocrystals, and has important implications for the interplay between irradiation‐induced defects and the external sample dimensions in the nanoscale.