Attractive double-layer forces between neutral hydrophobic and neutral hydrophilic surfaces.
The interaction between surface patches of proteins with different surface properties has a vital role to play driving conformational changes in 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 performed by solving a generalized Poisson-Boltzmann equation for two unequal surfaces. In the calculations, we utilize parametrized ion-surface potentials and dielectric-constant profiles deduced from recent non-primitive-model molecular dynamics simulations that partially account for molecular structure and hydration effects.
Instituto de Química, Universidade do Estado do Rio de Janeiro, PHLC, CEP 20550-900 Rio de Janeiro, Brazil. bos@ifm.liu.se
Eduardo R A
ER
Lima
Mathias
M
Boström
Nadine
N
Schwierz
Bo E
BE
Sernelius
Frederico W
FW
Tavares
D057927:Hydrophobic and Hydrophilic Interactions; D008958:Models, Molecular; D012492:Salts / Q000737:chemistry; D013499:Surface Properties
D012492:Salts