Study on multi-Yukawa potential between charged colloid particles

The Yukawa potential has the function to express both the attractive dispersion interaction and the double-layer repulsive electrostatic interaction. In this paper, a comprehensive review of recent advances in the use of mean spherical approximation (MSA) to solve the Ornstein-Zernike integral equation to Yukawa potential is introduced. The explicit analytical Yukawa EOSs used for neutral fluids and for like-charged colloid solutions are also described. The one-component multi-Yukawa EOS is deduced and tested by MC data. The pair correlation functions and the electrostatic potentials of mean force between like-charged colloid particles are determined by hypernetted-chain (HNC) approximation. The electrostatic attractive forces are existing between like-charged bovine serum albumin molecules in aqueous NaCl solutions under certain conditions. So the multi-Yukawa potentials are needed.