Superheating and solid-liquid phase coexistence in nanoparticles with non-melting surfaces

Details Superheating and solid-liquid phase coexistence in nanoparticles with non-melting surfaces Superheating and solid-liquid phase coexistence in nanoparticles with non-melting surfaces

2006-04-26

arxiv.org/abs/cond-mat/0604607v2

Phys. Rev. Lett. 96, 256101 (2006)

Physics

Condensed Matter

Materials Science

8 pages, 5 figures

Scientific paper

10.1103/PhysRevLett.96.256101

We present a phenomenological model of melting in nanoparticles with facets that are only partially wet by their liquid phase. We show that in this model, as the solid nanoparticle seeks to avoid coexistence with the liquid, the microcanonical melting temperature can exceed the bulk melting point, and that the onset of coexistence is a first-order transition. We show that these results are consistent with molecular dynamics simulations of aluminum nanoparticles which remain solid above the bulk melting temperature.

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