Attractive double-layer forces between neutral hydrophobic and neutral hydrophilic surfaces

Details Attractive double-layer forces between neutral hydrophobic and neutral hydrophilic surfaces Attractive double-layer forces between neutral hydrophobic and neutral hydrophilic surfaces

2012-01-05

arxiv.org/abs/1201.1143v1

Phys. Rev. E 84, 061903 (2011)

Physics

Condensed Matter

Soft Condensed Matter

5 pages, 8 figures

Scientific paper

10.1103/PhysRevE.84.061903

The interaction between surface patches of proteins with different surface properties has a vital role to play driving conformational changes of proteins in different salt solutions. We demonstrate the existence of ion-specific attractive double-layer forces between neutral hydrophobic and hydrophilic surfaces in the presence of certain salt solutions. This is done by solving a generalized Poisson-Boltzmann equation for two unequal surfaces. In the calculations we utilize parameterized ion-surface-potentials and dielectric-constant-profiles deduced from recent non-primitive-model molecular dynamics (MD) simulations that account partially for molecular structure and hydration effects.

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