Experimental Phase Diagram of a Binary Colloidal Hard-Sphere Mixture with a Large Size Ratio
- 21 August 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 75 (8) , 1662-1665
- https://doi.org/10.1103/physrevlett.75.1662
Abstract
We determined the phase diagram of a binary hard-sphere dispersion with size ratio 9.3. Phase separation into a fluid and a crystal of large spheres is observed. The fluid-solid binodal is determined by measurements of compositions of coexisting phases. The results agree qualitatively with recent theories, although the latter strongly overestimate the depletion activity of the smaller spheres. By fluorescent labeling we are able to measure the mobility of both particles separately. We found evidence for a new glassy phase in which only the small spheres are mobile.Keywords
This publication has 21 references indexed in Scilit:
- Entropy Driven Phase Separation in Binary EmulsionsPhysical Review Letters, 1995
- Phase Behaviour of Hard-Sphere MixturesEurophysics Letters, 1994
- Phase Separation of Asymmetric Binary Hard-Sphere Fluids: Self-Consistent Density Functional TheoryPhysical Review Letters, 1994
- A comparison between the long-time self-diffusion and low shear viscosity of concentrated dispersions of charged colloidal silica spheresThe Journal of Chemical Physics, 1994
- Entropically Driven Surface Phase Separation in Binary Colloidal MixturesPhysical Review Letters, 1994
- Phase Separation in Bimodal Dispersions of Sterically Stabilized Silica ParticlesEurophysics Letters, 1993
- Phase Separation in Binary Nearly-Hard-Sphere Colloids: Evidence for the Depletion ForceEurophysics Letters, 1992
- Phase separation of asymmetric binary hard-sphere fluidsPhysical Review Letters, 1991
- Hard sphere colloidal dispersions: Viscosity as a function of shear rate and volume fractionThe Journal of Chemical Physics, 1985
- Optical demonstration of crystalline superstructures in binary mixtures of latex globulesNature, 1980