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Pressure between charged polarizable surfaces
Alexandre Pereira Dos Santos (Instituto de Fisica, Universidade Federal do Rio Grande do Sul, Porto Alegre, Brazil)
We obtain phase diagrams and binodal curves for the repulsion/attraction between charged low dielectric/metallic surfaces in a salt-free environment. Punctual counterions are confined between the surfaces, however, they are not allowed to approach the surfaces nearer than a characteristic length which can model the ionic hydration. The polarization of the surfaces is considered with a recently introduced method based on periodic Green functions. We show that the density profiles are strongly dependent on the dielectric contrast in special for high electrostatic couplings. However, the pressure curves and consequently the binodal curves and critical points slightly change for different polarizable surfaces and hydration lengths.