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Anomalous detwinning in constrained Cu nanoparticle


In this work, the detwinning process in a 9-nm graphene-constrained Cu nanoparticle was investigated at 1009 °C via in situ high-resolution transmission electron microscopy. Instead of the expected reverse glide of the twinning dislocations, two new twins were formed; the four twin zones rotated synergistically before vanishing. Furthermore, the twin boundary migration energy and the system energy were increased continuously with detwinning. The increased resistance to twin boundary migration in constrained nanoparticles enriches our understanding of the twinning mechanism and may facilitate the design of high-strength and -ductility nanomaterials.

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Article information

19 Feb 2020
10 Jun 2020
First published
10 Jun 2020

Nanoscale, 2020, Accepted Manuscript
Article type

Anomalous detwinning in constrained Cu nanoparticle

M. Ge, W. Yuan, K. Wang, J. He, W. Xi and J. Luo, Nanoscale, 2020, Accepted Manuscript , DOI: 10.1039/D0NR01407A

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