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- W4385436327 abstract "Two-dimensional (2D) metal-organic frameworks (MOFs) hold immense potential for various applications due to their distinctive intrinsic properties compared to their 3D analogues. Herein, we designed in silico a highly stable NiF$_2$(pyrazine)$_2$ 2D MOF with a two-periodic wine-rack architecture. Extensive first-principles calculations and Molecular Dynamics simulations based on a newly developed machine learning potential (MLP) revealed that this 2D MOF exhibits huge in-plane Poisson's ratio anisotropy. This results into an anomalous negative in-plane stretchability, as evidenced by an uncommon decrease of its in-plane area upon the application of uniaxial tensile strain that makes this 2D MOF particularly attractive for flexible wearable electronics and ultra-thin sensor applications. We further demonstrated that the derived MLP offers a unique opportunity to effectively anticipate the finite temperature mechanical properties of MOFs at large scale. As a proof-concept, MLP-based Molecular Dynamics simulations were successfully achieved on 2D NiF$_2$(pyrazine)$_2$ with a dimension of 28.2$times$28.2 nm$^2$ relevant to the length scale experimentally attainable for the fabrication of MOF film." @default.
- W4385436327 created "2023-08-01" @default.
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- W4385436327 date "2023-07-27" @default.
- W4385436327 modified "2023-10-16" @default.
- W4385436327 title "Unravelling Negative In-plane Stretchability of 2D MOF by Large Scale Machine Learning Potential Molecular Dynamics" @default.
- W4385436327 doi "https://doi.org/10.48550/arxiv.2307.15127" @default.
- W4385436327 hasPublicationYear "2023" @default.
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