EXPANSION AND CRYSTALLIZATION OF A SEDIMENT OF CHARGED COLLOIDAL SPHERES

Jeroen S Van Duijneveldt, JKG DHONT, HNW LEKKERKERKER

Research output: Contribution to journalArticle (Academic Journal)peer-review

24 Citations (Scopus)

Abstract

An amorphous sediment of charged colloidal particles in a nonaqueous solvent was prepared by centrifugation. The evolution of sediment height and volume fraction profile to equilibrium were studied with light scattering. A simple sedimentation-diffusion equation allows the experimental data to be modeled quantitatively. The top of the sediment crystallizes within a week, whereas the lower part of the sediment does not show any sign of crystallization after several months, indicating a strong concentration dependence of crystallization rate.

Original languageEnglish
Pages (from-to)6941-6949
Number of pages9
JournalJournal of Chemical Physics
Volume99
Issue number9
Publication statusPublished - 1 Nov 1993

Keywords

  • X-RAY MEASUREMENTS
  • SETTLING SUSPENSIONS
  • ORDER TRANSITION
  • SILICA SPHERES
  • PHASE-DIAGRAM
  • DYNAMICS
  • MONODISPERSE
  • EQUILIBRIUM
  • DISPERSIONS
  • DIFFUSION

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