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- W3016921850 abstract "A metastable sp3-bonded carbon allotrope, Penta-C20, consisting entirely of carbon pentagons linked through bridge-like bonds, was proposed and studied in this work for the first time. Its structure, stability, and electronic and mechanical properties were investigated based on first-principles calculations. Penta-C20 is thermodynamically and mechanically stable, with equilibrium total energy of 0.718 and 0.184 eV/atom lower than those of the synthesized T-carbon and supercubane, respectively. Penta-C20 can also maintain dynamic stability under a high pressure of 100 GPa. Ab initio molecular dynamics (AIMD) simulations indicates that this new carbon allotrope can maintain thermal stability at 800 K. Its Young’s modulus exhibits mechanical anisotropy. The calculated ideal tensile and shear strengths confirmed that Penta-C20 is a superhard material with a promising application prospect. Furthermore, Penta-C20 is a direct band gap carbon based semiconducting material with band gap of 2.89 eV." @default.
- W3016921850 created "2020-04-24" @default.
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- W3016921850 date "2020-04-19" @default.
- W3016921850 modified "2023-10-17" @default.
- W3016921850 title "Penta-C20: A Superhard Direct Band Gap Carbon Allotrope Composed of Carbon Pentagon" @default.
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- W3016921850 doi "https://doi.org/10.3390/ma13081926" @default.
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