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Interaction of charged particles, induced by adding an oppositely charged polyion, gives rise to intriguing aggregation phenomena. The presence of short-range interactions in competition with electrostatic repulsions results, in an interval of concentrations around the inversion point, in the formations of long-lived clusters of polyelectrolyte-decorated particles. We will show that the whole aggregation...
Polymer chains adsorbed onto oppositely charged colloidal particles can significantly modify the particle-particle interactions. For sufficient amounts of added polymers, the original electrostatic repulsion can even turn into an effective attraction and relatively large aggregates can form. The attractive interaction contribution between two particles arises from the correlated adsorption of polyions...
The thermodynamic properties of monolayers of double chain cationic lipids DOTAP at the air–water interface have been investigated by means of surface pressure and surface potential measurements. We studied the interfacial properties of the film in the liquid-expanded regime during the isothermal compression in the presence of oppositely charged linear polyions (poly(acrylate)sodium salt, [NaPA])...
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