| nderstanding interactions between colloids (or nanoparticles) immersed in a critical binary mixture is of both fundamental and technological importance. Here we discuss interactions due to critical Casimir effects, which are important near but above a critical point, as well as a novel type of interparticle attractive interaction of a purely dynamic origin, which is induced by a temperature quench into a two-phase region. We employed a coarse-grained numerical simulation, which we call Fluid-Particle-Dynamics method, to incorporate the hydrodynamic degrees of freedom of a binary mixture. In addition to the static aspect of interactions, we discuss the kinetic aspects originating from dynamical coupling between the concentration and velocity fields. |
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