Abstract
Coalescence of metal nanodroplets and sintering of solid Au, Pd, and Pt nanoparticles were simulated using isothermal molecular dynamics and the embedded-atom method. It was found that the scheme describing sintering of solid nanoparticles transfers to the coalescence scheme not at the nanoparticle melting point Tm, but at a lower characteristic temperature T0 ≈ 0.9 Tm, which can be interpreted as a critical temperature corresponding to the bifurcation phenomenon. The bifurcation in question indicates that at the same fixed temperature in the range from (T0 − 2 K) to (T0 + 2 K) daughter nanoparticles containing the same number of atoms can be either liquid-like (coalescence) or crystalline (sintering).
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Based on the materials of the XXXIII Symposium “Modern Chemical Physics” (September 24–October 4, 2021, Tuapse, Russia).
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 686–693, April, 2022.
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Puytov, V.V., Romanov, A.A., Talyzin, I.V. et al. Features and mechanisms of coalescence of nanodroplets and sintering of metal nanoparticles: molecular dynamics simulation. Russ Chem Bull 71, 686–693 (2022). https://doi.org/10.1007/s11172-022-3466-6
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DOI: https://doi.org/10.1007/s11172-022-3466-6