Coarse Grained Modeling of The Interface Between Water and Heterogeneous Surfaces

Details Coarse Grained Modeling of The Interface Between Water and Heterogeneous Surfaces Coarse Grained Modeling of The Interface Between Water and Heterogeneous Surfaces

2008-04-07

arxiv.org/abs/0804.1134v2

Physics

Condensed Matter

Statistical Mechanics

17 pages, 6 figures

Scientific paper

Using coarse grained models we investigate the behavior of water adjacent to an extended hydrophobic surface peppered with various fractions of hydrophilic patches of different sizes. We study the spatial dependence of the mean interface height, the solvent density fluctuations related to drying the patchy substrate, and the spatial dependence of interfacial fluctuations. We find that adding small uniform attractive interactions between the substrate and solvent cause the mean position of the interface to be very close to the substrate. Nevertheless, the interfacial fluctuations are large and spatially heterogeneous in response to the underlying patchy substrate. We discuss the implications of these findings to the assembly of heterogeneous surfaces.

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