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- W4290098850 abstract "The melting thermodynamic characteristics of 2- to 20-layered onion-like fullerenes (OLFn) (C60@C240to C60@···@C6000···@C24000) are comprehensively explored using first-principles-based ReaxFF atomistic simulations and random forest machine learning (RF ML). It is revealed that OLFnshows lower thermal stability than the counterparts of single-walled fullerenes (SWFn). The melting point of SWFnincreases monotonically with increasing size, whereas for OLFn, an unusual size-dependent melting point is observed; OLFnwith intermediate size shows the highest melting point. For small OLFn, the melting occurs from the inner to the outer, whereas for large OLFn, it nucleates from the inner to the outer and to intermediate fullerenes. The melting and erosion behaviors of both SWFnand OLFnare mainly characterized by the nucleation of non-hexagons, nanovoids, carbon chains and emission of C2. RF ML model is developed to predict the melting points of both SWFnand OLFn. Moreover, the analysis of the feature importance reveals that the Stone-Wales transformation is a critical pathway in the melting of SWFnand OLFn. This study provides new insights and perspectives into the thermodynamics and pyrolysis chemistry of fullerenic carbons, and also may shed some lights onto the understanding of thermally-induced erosion of carbon-based resources and spacecraft materials." @default.
- W4290098850 created "2022-08-06" @default.
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- W4290098850 date "2022-08-17" @default.
- W4290098850 modified "2023-09-23" @default.
- W4290098850 title "Size-dependent melting of onion-like fullerenic carbons: a molecular dynamics and machine learning study" @default.
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- W4290098850 doi "https://doi.org/10.1088/1361-648x/ac877e" @default.
- W4290098850 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35931061" @default.
- W4290098850 hasPublicationYear "2022" @default.
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