The phase diagram of charged colloidal suspensions

Daniel Hone, S. Alexander, P. M. Chaikin, P. Pincus

    Research output: Contribution to journalArticle

    Abstract

    The thermodynamics of a system of identical electrically charged spheres in colloidal suspension in a polar fluid (typically, H2O), are calculated within a model of point particles interacting via a screened Coulomb (Yukawa) potential of suitably renormalized strength. The particles are taken to be sufficiently massive that a classical theory is appropriate. The free energies of the crystalline phases are calculated within a mean field theory which is an extension of the self-consistent harmonic approximation. The melting curve is estimated from the semiempirical Lindemann rule, with mean squared displacements again calculated self-consistently. As functions of the relevant parameters: electrical charge of each sphere, density of spheres and added salt concentration, stable predicted phases include fee and bcc crystals and a disordered fluid. Under suitable circumstances a reentrant bcc→fcc→bcc transition is predicted as salt is added, and bcc is predicted always likely to be the stable phase just below the melting transition.

    Original languageEnglish (US)
    Pages (from-to)1474-1479
    Number of pages6
    JournalThe Journal of chemical physics
    Volume79
    Issue number3
    StatePublished - 1983

    Fingerprint

    Phase diagrams
    colloids
    Suspensions
    phase diagrams
    Melting
    Salts
    melting
    salts
    Yukawa potential
    Mean field theory
    Fluids
    fluids
    Free energy
    free energy
    Thermodynamics
    Crystalline materials
    harmonics
    thermodynamics
    Crystals
    curves

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Cite this

    Hone, D., Alexander, S., Chaikin, P. M., & Pincus, P. (1983). The phase diagram of charged colloidal suspensions. The Journal of chemical physics, 79(3), 1474-1479.

    The phase diagram of charged colloidal suspensions. / Hone, Daniel; Alexander, S.; Chaikin, P. M.; Pincus, P.

    In: The Journal of chemical physics, Vol. 79, No. 3, 1983, p. 1474-1479.

    Research output: Contribution to journalArticle

    Hone, D, Alexander, S, Chaikin, PM & Pincus, P 1983, 'The phase diagram of charged colloidal suspensions', The Journal of chemical physics, vol. 79, no. 3, pp. 1474-1479.
    Hone D, Alexander S, Chaikin PM, Pincus P. The phase diagram of charged colloidal suspensions. The Journal of chemical physics. 1983;79(3):1474-1479.
    Hone, Daniel ; Alexander, S. ; Chaikin, P. M. ; Pincus, P. / The phase diagram of charged colloidal suspensions. In: The Journal of chemical physics. 1983 ; Vol. 79, No. 3. pp. 1474-1479.
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