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Rescaled mean spherical approximation for colloidal mixtures

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  • Ruiz-Estrada, H.
  • Medina-Noyola, M.
  • Nägele, G.

Abstract

In this work, the rescaled mean spherical approximation (RMSA) for colloidal mixtures interacting via a DLVO-type potential is developed, and its application to suspensions of highly charged macroions is illustrated. For this purpose we introduce a simple scheme to solve the mean spherical approximation (MSA) for Yukawa mixtures with factorized coupling parameters. This scheme consists of the mapping of the Yukawa system onto a corresponding primitive model system. Such a correspondence is used as a device for the calculation of the static structure functions of the original Yukawa mixture. Within this scheme, a straightforward implementation of the rescaling procedure is performed, which allows for the calculation of partial structure factors in strongly interacting mixtures. The rescaling procedure we use is an extension of that introduced by Hansen and Hayter for monodisperse suspensions. The structure factors obtained with the rescaled mean spherical approximation compare well with computer simulation results. The advantages and limitations of the RMSA are also discussed in some detail.

Suggested Citation

  • Ruiz-Estrada, H. & Medina-Noyola, M. & Nägele, G., 1990. "Rescaled mean spherical approximation for colloidal mixtures," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 168(3), pages 919-941.
    • Handle: RePEc:eee:phsmap:v:168:y:1990:i:3:p:919-941
    DOI: 10.1016/0378-4371(90)90263-R
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    References listed on IDEAS

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    1. Høye, J.S. & Bedeaux, D., 1977. "On the dielectric constant for a non-polar fluid, a comparison," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 87(2), pages 288-301.
    2. Khoury, Nabil T. & Medina, Ephraïm, 1985. "La structure du capital : une synthèse des orientations théoriques et empiriques de la dernière décennie," L'Actualité Economique, Société Canadienne de Science Economique, vol. 61(3), pages 362-387, septembre.
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    Cited by:

    1. Méndez-Maldonado, G.A. & Ruiz-Estrada, H. & González-Melchor, M. & Rivas-Silva, J.F. & Nieto-Frausto, J., 2012. "Analytical static structure factors for the restricted primitive model," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 391(4), pages 1759-1769.

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