材料期刊网

Based on density-functional theory and the modified fundamental measure theory for the classical fluid, the equilibrium density distribution of charged hard-sphere fluid confined in parallel plates was studied. By comparing the density distributions in the case of with and without applied electric field, the effect of the electric field on the molecular density is presented. It is shown that the competition between the Coulomb's interaction and the field-induced potential energy plays an important role in the aggregated state of charged hard-sphere fluid. The corresponding results can provide helpful clues for understanding quantitatively the properties of plasmas, ionic liquids and electrolyte solutions confined in mesoscopic scale.