Nucleation on a sphere: the roles of curvature, confinement and ensemble
| Autor: | Mark A. Miller, Alex G. Wong, Jack O. Law, Halim Kusumaatmaja |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Canonical ensemble
Surface (mathematics) Physics Phase transition Condensed matter physics Monte Carlo method Isotropy Biophysics Nucleation FOS: Physical sciences 02 engineering and technology Computational Physics (physics.comp-ph) Condensed Matter - Soft Condensed Matter 021001 nanoscience & nanotechnology Condensed Matter Physics Curvature 01 natural sciences Grand canonical ensemble 0103 physical sciences Soft Condensed Matter (cond-mat.soft) Physical and Theoretical Chemistry 010306 general physics 0210 nano-technology Physics - Computational Physics Molecular Biology |
| Zdroj: | Molecular physics, 2018, Vol.116(21-22), pp.3008-3019 [Peer Reviewed Journal] |
| ISSN: | 1362-3028 0026-8976 |
| DOI: | 10.1080/00268976.2018.1483041 |
| Popis: | By combining Monte Carlo simulations and analytical models, we demonstrate and explain how the gas-to-liquid phase transition of colloidal systems confined to a spherical surface depends on the curvature and size of the surface, and on the choice of thermodynamic ensemble. We find that the geometry of the surface affects the shape of the free energy profile and the size of the critical nucleus by altering the perimeter-area ratio of isotropic clusters. Confinement to a smaller spherical surface results in both a lower nucleation barrier and a smaller critical nucleus size. Furthermore, the liquid domain does not grow indefinitely on a sphere. Saturation of the liquid density in the grand canonical ensemble and the depletion of the gas phase in the canonical ensemble lead to a minimum in the free energy profile, with a sharp increase in free energy for additional growth beyond this minimum. 13 pages, 7 figures 1 Revision: In the original arXive submission, Halim Kusumaatmaja's name has been mistakenly left out of the metadata |
| Databáze: | OpenAIRE |
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