skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: ‘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:
 [1];  [2];  [3]; ORCiD logo [2]
  1. City University of Hong Kong (China); Shanghai Institute of Technology (China)
  2. City University of Hong Kong (China); Hong Kong Branch of National Precious Metals Material Engineering Research Center (NPMM) (China)
  3. Rice Univ., Houston, TX (United States)
Publication Date:
Research Org.:
Rice Univ., Houston, TX (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1510131
Alternate Identifier(s):
OSTI ID: 1510478
Grant/Contract Number:  
SC0010688; FG02-13ER46967
Resource Type:
Journal Article: Published Article
Journal Name:
Materials Research Letters
Additional Journal Information:
Journal Volume: 6; Journal Issue: 1; Journal ID: ISSN 2166-3831
Publisher:
Taylor and Francis
Country of Publication:
United States
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 States: 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 States. doi: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 States. doi: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},
issn = {2166-3831},
number = 1,
volume = 6,
place = {United States},
year = {2017},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1080/21663831.2017.1383317

Save / Share: