Structure and Thermodynamics of Solutions of Colloids Interacting Through Yukawa or Sogami Potentials

Abstract

The aim of the present work is the determination of the structure and thermodynamics of a monodisperse colloidal solution. We assume that the interaction potential between colloids is of Yukawa or Sogami types. The former is purely repulsive, while the second, it involves, in addition to a repulsive part, a Van der Waals attractive tail. We compute the structure factor and thermodynamics properties, using, the integral equation one with the hybridized mean spherical approximation. We first compare the results relative to this theory, and with this obtained within Monte Carlo simulation. We show that results from integral equation method with a Sogami potential and those of simulation are in good quantitative agreement. Finally, our theoretical results are compared to those of experiment by Tata and coworkers. We find that integral equation theory with Sogami potential agrees well with experiment.