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- Publisher Website: 10.1038/ncomms14116
- Scopus: eid_2-s2.0-85010289397
- PMID: 28098140
- WOS: WOS:000392156700001
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Article: Dynamical observations on the crack tip zone and stress corrosion of two-dimensional MoS2
Title | Dynamical observations on the crack tip zone and stress corrosion of two-dimensional MoS2 |
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Authors | |
Issue Date | 2017 |
Citation | Nature Communications, 2017, v. 8, article no. 14116 How to Cite? |
Abstract | Whether and how fracture mechanics needs to be modified for small length scales and in systems of reduced dimensionality remains an open debate. Here, employing in situ transmission electron microscopy, atomic structures and dislocation dynamics in the crack tip zone of a propagating crack in two-dimensional (2D) monolayer MoS 2 membrane are observed, and atom-to-atom displacement mapping is obtained. The electron beam is used to initiate the crack; during in situ observation of crack propagation the electron beam effect is minimized. The observed high-frequency emission of dislocations is beyond previous understanding of the fracture of brittle MoS 2. Strain analysis reveals dislocation emission to be closely associated with the crack propagation path in nanoscale. The critical crack tip plastic zone size of nearly perfect 2D MoS 2 is between 2 and 5 nm, although it can grow to 10 nm under corrosive conditions such as ultraviolet light exposure, showing enhanced dislocation activity via defect generation. |
Persistent Identifier | http://hdl.handle.net/10722/298196 |
PubMed Central ID | |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Ly, Thuc Hue | - |
dc.contributor.author | Zhao, Jiong | - |
dc.contributor.author | Cichocka, Magdalena Ola | - |
dc.contributor.author | Li, Lain Jong | - |
dc.contributor.author | Lee, Young Hee | - |
dc.date.accessioned | 2021-04-08T03:07:53Z | - |
dc.date.available | 2021-04-08T03:07:53Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Nature Communications, 2017, v. 8, article no. 14116 | - |
dc.identifier.uri | http://hdl.handle.net/10722/298196 | - |
dc.description.abstract | Whether and how fracture mechanics needs to be modified for small length scales and in systems of reduced dimensionality remains an open debate. Here, employing in situ transmission electron microscopy, atomic structures and dislocation dynamics in the crack tip zone of a propagating crack in two-dimensional (2D) monolayer MoS 2 membrane are observed, and atom-to-atom displacement mapping is obtained. The electron beam is used to initiate the crack; during in situ observation of crack propagation the electron beam effect is minimized. The observed high-frequency emission of dislocations is beyond previous understanding of the fracture of brittle MoS 2. Strain analysis reveals dislocation emission to be closely associated with the crack propagation path in nanoscale. The critical crack tip plastic zone size of nearly perfect 2D MoS 2 is between 2 and 5 nm, although it can grow to 10 nm under corrosive conditions such as ultraviolet light exposure, showing enhanced dislocation activity via defect generation. | - |
dc.language | eng | - |
dc.relation.ispartof | Nature Communications | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.title | Dynamical observations on the crack tip zone and stress corrosion of two-dimensional MoS2 | - |
dc.type | Article | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.1038/ncomms14116 | - |
dc.identifier.pmid | 28098140 | - |
dc.identifier.pmcid | PMC5253633 | - |
dc.identifier.scopus | eid_2-s2.0-85010289397 | - |
dc.identifier.volume | 8 | - |
dc.identifier.spage | article no. 14116 | - |
dc.identifier.epage | article no. 14116 | - |
dc.identifier.eissn | 2041-1723 | - |
dc.identifier.isi | WOS:000392156700001 | - |
dc.identifier.issnl | 2041-1723 | - |