Ion-specific effects in the colloid-colloid or protein-protein potential of mean force: Role of salt-macroion van der Waals interactions

Article Abstract:

The mean force between two colloidal particles in a saline solution is calculated by augmenting electrostatic interactions with salt-specific dispersion (van der Waals) interactions between small ions and macro ions. The lifshitz theory provides a basis for calculating the van der Waals interaction between macroion-macroion, cation-macroion, anion-macroion, cation-cation and anion-anion pairs.

Ions, Electrolyte solutions, Colloid chemistry

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Crystallization behaviors of n-nonadecane in confined space: Observation of metastable phase induced by surface freezing

Article Abstract:

Crystallization and phase transition behaviors of n-nonadecane in microcapsules with a diameter of about 5 micro [mu]m are analyzed with the combination of differential scanning calorimetry (DSC) and synchrotron radiation X-ray diffraction (XRD). The formation of a surface freezing monolayer has provided ideal nucleation sites and decreased surface free energy of the [R.sub.II] phase.

Phase transformations (Statistical physics), Phase transitions (Physics), Monomolecular films, Properties

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Nonergodicity for a van der Waals glass model

Article Abstract:

The question of how glassiness can remain finite in the van der Waals model of structural glass in situations where the Ginzburg approach near the spinodal line of fluid instability against crystallization is satisfied is analyzed. The relationship between dynamic and static calculations of the nonergodicity parameter is discussed.

Flat Glass, Flat Glass Manufacturing, Models, Fluids

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