‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending
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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2018-01-01
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| Series: | Materials Research Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/21663831.2017.1383317 |
| _version_ | 1819090439051935744 |
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| author | Binjun Wang Hongti Zhang Jun Lou Yang Lu |
| author_facet | Binjun Wang Hongti Zhang Jun Lou Yang Lu |
| author_sort | Binjun Wang |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-21T22:23:50Z |
| format | Article |
| id | doaj.art-4d63478ef261480abacf21460fd3bb63 |
| institution | Directory Open Access Journal |
| issn | 2166-3831 |
| language | English |
| last_indexed | 2024-12-21T22:23:50Z |
| publishDate | 2018-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Materials Research Letters |
| spelling | doaj.art-4d63478ef261480abacf21460fd3bb632022-12-21T18:48:16ZengTaylor & Francis GroupMaterials Research Letters2166-38312018-01-0161132110.1080/21663831.2017.13833171383317‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bendingBinjun Wang0Hongti Zhang1Jun Lou2Yang Lu3City University of Hong KongCity University of Hong KongRice UniversityCity University of Hong KongWe 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.http://dx.doi.org/10.1080/21663831.2017.1383317Nanotwinnickel nanowirenanomechanicsin situ TEMmolecular dynamics simulation |
| spellingShingle | Binjun Wang Hongti Zhang Jun Lou Yang Lu ‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending Materials Research Letters Nanotwin nickel nanowire nanomechanics in situ TEM molecular dynamics simulation |
| title | ‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending |
| title_full | ‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending |
| title_fullStr | ‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending |
| title_full_unstemmed | ‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending |
| title_short | ‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending |
| title_sort | unzipping of twin lamella in nanotwinned nickel nanowires under flexural bending |
| topic | Nanotwin nickel nanowire nanomechanics in situ TEM molecular dynamics simulation |
| url | http://dx.doi.org/10.1080/21663831.2017.1383317 |
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