Mechanical Anisotropy in Two-Dimensional Selenium Atomic Layers
Two-dimensional (2D) trigonal selenium (t-Se) has become a new member in 2D semiconducting nanomaterial families. It is composed of well-aligned one-dimensional Se atomic chains bonded via van der Waals (vdW) interaction. The contribution of this unique anisotropic nanostructure to its mechanical properties has not been explored. Here, for the first time, we combine experimental and theoretical analyses to study the anisotropic mechanical properties of individual 2D t-Se nanosheets. It was found that its fracture strength and Young's modulus parallel to the atomic chain direction are much higher than along the transverse direction, which was attributed to the weak vdW interaction between Se atomic chains as compared to the covalent bonding within individual chains. Additionally, two distinctive fracture modes along two orthogonal loading directions were identified. This work provides important insights into the understanding of anisotropic mechanical behaviors of 2D semiconducting t-Se and opens new possibilities for future applications.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:21 |
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| Enthalten in: |
Nano letters - 21(2021), 19 vom: 13. Okt., Seite 8043-8050 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Qin, Jing-Kai [VerfasserIn] |
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| Links: |
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| Themen: |
2D t-Se nanosheets |
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| Anmerkungen: |
Date Completed 14.10.2021 Date Revised 14.10.2021 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1021/acs.nanolett.1c02294 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM330924893 |
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| 500 | |a Citation Status MEDLINE | ||
| 520 | |a Two-dimensional (2D) trigonal selenium (t-Se) has become a new member in 2D semiconducting nanomaterial families. It is composed of well-aligned one-dimensional Se atomic chains bonded via van der Waals (vdW) interaction. The contribution of this unique anisotropic nanostructure to its mechanical properties has not been explored. Here, for the first time, we combine experimental and theoretical analyses to study the anisotropic mechanical properties of individual 2D t-Se nanosheets. It was found that its fracture strength and Young's modulus parallel to the atomic chain direction are much higher than along the transverse direction, which was attributed to the weak vdW interaction between Se atomic chains as compared to the covalent bonding within individual chains. Additionally, two distinctive fracture modes along two orthogonal loading directions were identified. This work provides important insights into the understanding of anisotropic mechanical behaviors of 2D semiconducting t-Se and opens new possibilities for future applications | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a Research Support, Non-U.S. Gov't | |
| 650 | 4 | |a 2D t-Se nanosheets | |
| 650 | 4 | |a DFT calculation | |
| 650 | 4 | |a MD simulation | |
| 650 | 4 | |a anisotropic mechanical properties | |
| 650 | 4 | |a in situ nanomechanical testing | |
| 650 | 7 | |a Selenium |2 NLM | |
| 650 | 7 | |a H6241UJ22B |2 NLM | |
| 700 | 1 | |a Sui, Chao |e verfasserin |4 aut | |
| 700 | 1 | |a Qin, Zhao |e verfasserin |4 aut | |
| 700 | 1 | |a Wu, Jianyang |e verfasserin |4 aut | |
| 700 | 1 | |a Guo, Hua |e verfasserin |4 aut | |
| 700 | 1 | |a Zhen, Liang |e verfasserin |4 aut | |
| 700 | 1 | |a Xu, Cheng-Yan |e verfasserin |4 aut | |
| 700 | 1 | |a Chai, Yang |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Chao |e verfasserin |4 aut | |
| 700 | 1 | |a He, Xiaodong |e verfasserin |4 aut | |
| 700 | 1 | |a Ye, Peide D |e verfasserin |4 aut | |
| 700 | 1 | |a Lou, Jun |e verfasserin |4 aut | |
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