期刊
JOURNAL OF CHEMICAL PHYSICS
卷 134, 期 7, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3555627
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资金
- NWO-ECHO
- NWO-VICI
We study suspensions of colloidal spheres with a constant zeta-potential within Poisson-Boltzmann theory, quantifying the discharging of the spheres with increasing colloid density and decreasing salt concentration. We use the calculated renormalized charge of the colloids to determine their pair-wise effective screened-Coulomb repulsions. Bulk phase diagrams in the colloid concentration-salt concentration representation follow, for various zeta-potentials, by a mapping onto published fits of phase boundaries of point-Yukawa systems. Although the resulting phase diagrams do feature face-centered cubic and body-centered cubic phases, they are dominated by the (re-entrant) fluid phase due to the colloidal discharging with increasing colloid concentration and decreasing salt concentration. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3555627]
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