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8th Liquid Matter Conference September 6-10, 2011 Wien, Austria ...

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Fri 911:<strong>10</strong>-14:00P4.5Potential theory of the polymer-mediated interactions incolloid-polymer mixturesAlexander Chervanyov 1 and Gert Heinrich 11 IPF Dresden, Hohe 6, 01187, Dresden, GermanyBy developing and making use of the novel potential theory, we investigate several important casesof the polymer mediated interaction between spherical colloids in the colloid-polymer-solvent mixtures.We calculate the polymer-mediated interaction potential acting between nano-particle colloidswith the many-body effects taken into account. Using the obtained results, we derive theequation of state of the colloid-polymer mixtures by taking into account the interactions betweenpolymers and colloid surfaces. In addition, we thoroughly investigate the effect of confinementon the depletion interaction. As a separate case, we investigate the polymer mediated interactionbetween colloids that bear irreversibly adsorbed polymers. Comparison of the present theoreticalfindings with the available experimental data and simulations is discussed.5

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