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Issue 41, 2013
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Selective nucleation in porous media

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Geometrical arguments suggest that pore-mediated nucleation happens in general in a two-step fashion, the first step being nucleation within the pore, the second being nucleation from the filled pore into solution [Page and Sear, Phys. Rev. Lett., 2006, 97, 65701]. The free energy barriers controlling the two steps of this process show opposite dependencies on pore size, implying that for given thermodynamic conditions there exists a pore size for which nucleation happens fastest. Here we show, within the two- and three-dimensional Ising lattice gas, that this preferred pore size tracks the size of the bulk critical nucleus, up to a numerical prefactor. This observation suggests a simple prescription for directing nucleation to certain locations within heterogeneous porous media.

Graphical abstract: Selective nucleation in porous media

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Article information

16 Jul 2013
06 Aug 2013
First published
13 Aug 2013

Soft Matter, 2013,9, 9763-9766
Article type

Selective nucleation in porous media

L. O. Hedges and S. Whitelam, Soft Matter, 2013, 9, 9763
DOI: 10.1039/C3SM51946E

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