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Length-scale crossover of the hydrophobic interaction in a coarse-grained water model
Journal article   Peer reviewed

Length-scale crossover of the hydrophobic interaction in a coarse-grained water model

Aviel Chaimovich and M Scott Shell
Physical review. E, Statistical, nonlinear, and soft matter physics, v 88(5), 052313
Nov 2013
PMID: 24329270

Abstract

It has been difficult to establish a clear connection between the hydrophobic interaction among small molecules typically studied in molecular simulations (a weak, oscillatory force) and that found between large, macroscopic surfaces in experiments (a strong, monotonic force). Here, we show that both types of interaction can emerge with a simple, core-softened water model that captures water's unique pairwise structure. As in hydrophobic hydration, we find that the hydrophobic interaction manifests a length-scale dependence, exhibiting distinct driving forces in the molecular and macroscopic regimes. Moreover, the ability of this simple model to capture both regimes suggests that several features of the hydrophobic force can be understood merely through water's pair correlations.

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Web of Science research areas
Physics, Fluids & Plasmas
Physics, Mathematical
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