Depletion Interactions In Charged Colloidal Systems

As is known that the colloidal systems are very complex, andtherefore have attracted more and attentions during these years. In fact,colloids exist in many fields. They are not only related to the life, such asblood, collagen, viruses, but also are commonly used in industry likedetergents, cosmetics, paints, inks, food, etc. It is clear that the colloidsare important to our life and have broad application prospects. Obviously,the charged colloids are more complex, and the study of the effectiveinteractions among the charged colloidal particles can help us get thestabilities and structures of these systems. Fortunately, many scientistshave made much progress on them. Making use of the hyper-spheremethod and Monte Carlo simulations, we have investigated the effectiveinteractions of the primitive model for the charged colloidal systems inthis thesis. We hope that our study can help us to get useful informationabout the colloids and their applications in the industry and in the livingthings.The thesis consists of four chapters. In the first chapter, we brieflyintroduce the soft matter, including the properties of the colloids, theprogress, theories and some results of the experiments and simulations onthe charged or uncharged colloidal systems. In the second chapter, wediscuss the influence on the depletion effects from the Coulombinteractions among the charged spheres and the charged plates. Theeffects on the depletion interactions in the charged systems from thegeometrical confinements are investigated in the third chapter. In addition,some interesting results about the charged systems with different chargeratios are obtained. Finally, a summary of our work and an outlook aboutthe charged colloidal system are given.