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Supergiant elasticity and fracture of 3D spirally wound MoS₂

Wu, Jianyang and He, Jianying and Ariza, Pilar and Ortiz, Michael and Zhang, Zhiliang (2020) Supergiant elasticity and fracture of 3D spirally wound MoS₂. International Journal of Fracture, 223 . pp. 39-52. ISSN 0376-9429. https://resolver.caltech.edu/CaltechAUTHORS:20200326-080855730

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Abstract

Recently experimentally synthesized three-dimensional (3D) MoS₂MoS₂ spiral is a new kind of helical structure with technically robust properties. Among them, the mechanical properties of such appealing materials are indispensable but remain unexplored. Here, the stretching characteristics of 3D spirally wound MoS₂MoS₂ as a new type of mechanical nanospring are explored by using large-scale molecular dynamic (MD) simulations. It is revealed that the MoS₂MoS₂ spiral structures not only exhibit unique sawtooth-like tensile responses inaccessible from conventional springs, but also hold high stretching deformation capabilities. Surprisingly, there is a critical inner radius which induces a jump of elasticity but not in the tensile strength; below it yields elastic strain of less than 320%, while above which the elastic strain is over 1900%. The supergiant elasticity is primarily caused by the sliding–reorientation action, stepwise opening and elastic deformation of nanoribbons of MoS₂MoS₂ spirals. Moreover, imposed strain energy is mainly absorbed by the inner edges of MoS₂MoS₂ spirals, and MoS₂MoS₂ spirals catastrophically fail at the corner of the inner hexagon-edge of buckled MoS₂MoS₂ nanoribbons that are more stress-concentrated. This study provides important insights into facile design of MoS₂MoS₂ spiral-based nanosprings with supergiant elongation capability for practical applications.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1007/s10704-020-00427-5DOIArticle
https://link.springer.com/article/10.1007/s10704-020-00427-5PublisherArticle
https://rdcu.be/cejKXPublisherFree ReadCube access
ORCID:
AuthorORCID
Ariza, Pilar0000-0003-0266-0216
Ortiz, Michael0000-0001-5877-4824
Additional Information:© 2020 Springer-Verlag. Received 31 July 2019; Accepted 18 January 2020; Published 03 February 2020. This work is financially supported by the National Natural Science Foundation of China (Grant Nos. 11772278 and 11502221), the Jiangxi Provincial Outstanding Young Talents Program (20192BCBL23029), the Fundamental Research Funds for the Central Universities (Xiamen University: Grant Nos. 20720180014, 20720180018 and 20720160088), Fujian Provincial Department of Science & Technology (2017J05028), “111” Project (B16029) and the 1000 Talents Program from Xiamen University. The computational resources were provided by the Norwegian Metacenter for Computational Science (NOTUR NN9110K and NN9391K).
Group:GALCIT
Funders:
Funding AgencyGrant Number
National Natural Science Foundation of China11772278
National Natural Science Foundation of China11502221
Jiangxi Provincial Outstanding Young Talents Program20192BCBL23029
Fundamental Research Funds for the Central Universities20720180014
Fundamental Research Funds for the Central Universities20720180018
Fundamental Research Funds for the Central Universities20720160088
Fujian Provincial Department of Science & Technology2017J05028
111 Project of ChinaB16029
Xiamen UniversityUNSPECIFIED
Thousand Talents Plan of ChinaUNSPECIFIED
Norwegian Metacenter for computational ScienceNN9110K
Norwegian Metacenter for computational ScienceNN9391K
Subject Keywords:MoS2 spirals; Molecular dynamic simulation; Critical inner radius; Stepwise opening; Supergiant elasticity
Record Number:CaltechAUTHORS:20200326-080855730
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200326-080855730
Official Citation:Wu, J., He, J., Ariza, P. et al. Supergiant elasticity and fracture of 3D spirally wound MoS2. Int J Fract 223, 39–52 (2020). https://doi.org/10.1007/s10704-020-00427-5
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:102113
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:26 Mar 2020 15:43
Last Modified:03 Feb 2021 16:02

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