‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending
Abstract
We report the fabrication of nickel nanowires with parallel growth-twin structures (‘twin lamella’ along the wire axis) by electrochemical deposition, and demonstrate an interesting twin ‘unzipping’ phenomenon in such nanotwinned nanowires under bending. Through in situ TEM, we found that ‘unzipping’ of twin lamella was achieved by gradually increasing twin spacing along the wire axis via a layer-by-layer twin boundary migration process. Molecular dynamics simulations suggest that partial dislocation slip is responsible for activating the ‘unzipping’, with a multi-step-process involving dislocation loop initiation, expansion and partially annihilation. Our work could provide new insights into the deformation mechanisms of nanotwinned 1-D metallic nanostructures.
- Authors:
-
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, People’s Republic of China, School of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai, People’s Republic of China
- Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, People’s Republic of China, Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM), Hong Kong, People’s Republic of China, Centre for Advanced Structural Materials (CASM), Shenzhen Research Institute, City University of Hong Kong, Shenzhen, People’s Republic of China
- Department of Materials Science and Nano-Engineering, Rice University, Houston, TX, USA
- Publication Date:
- Research Org.:
- Rice Univ., Houston, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1510131
- Alternate Identifier(s):
- OSTI ID: 1510478
- Grant/Contract Number:
- FG02-13ER46967; SC0010688
- Resource Type:
- Published Article
- Journal Name:
- Materials Research Letters
- Additional Journal Information:
- Journal Name: Materials Research Letters Journal Volume: 6 Journal Issue: 1; Journal ID: ISSN 2166-3831
- Publisher:
- Informa UK Limited
- Country of Publication:
- United Kingdom
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 42 ENGINEERING; Nanotwin; nickel nanowire; nanomechanics; in situ TEM; molecular dynamics; simulation
Citation Formats
Wang, Binjun, Zhang, Hongti, Lou, Jun, and Lu, Yang. ‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending. United Kingdom: N. p., 2017.
Web. doi:10.1080/21663831.2017.1383317.
Wang, Binjun, Zhang, Hongti, Lou, Jun, & Lu, Yang. ‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending. United Kingdom. https://doi.org/10.1080/21663831.2017.1383317
Wang, Binjun, Zhang, Hongti, Lou, Jun, and Lu, Yang. Thu .
"‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending". United Kingdom. https://doi.org/10.1080/21663831.2017.1383317.
@article{osti_1510131,
title = {‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending},
author = {Wang, Binjun and Zhang, Hongti and Lou, Jun and Lu, Yang},
abstractNote = {We report the fabrication of nickel nanowires with parallel growth-twin structures (‘twin lamella’ along the wire axis) by electrochemical deposition, and demonstrate an interesting twin ‘unzipping’ phenomenon in such nanotwinned nanowires under bending. Through in situ TEM, we found that ‘unzipping’ of twin lamella was achieved by gradually increasing twin spacing along the wire axis via a layer-by-layer twin boundary migration process. Molecular dynamics simulations suggest that partial dislocation slip is responsible for activating the ‘unzipping’, with a multi-step-process involving dislocation loop initiation, expansion and partially annihilation. Our work could provide new insights into the deformation mechanisms of nanotwinned 1-D metallic nanostructures.},
doi = {10.1080/21663831.2017.1383317},
journal = {Materials Research Letters},
number = 1,
volume = 6,
place = {United Kingdom},
year = {2017},
month = {10}
}
https://doi.org/10.1080/21663831.2017.1383317
Web of Science
Figures / Tables:

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