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Crystal nucleation versus vitrification in charged colloidal suspensions

  • H. -J. Schöpe
  • T. Palberg
Conference paper
Part of the Progress in Colloid and Polymer Science book series (PROGCOLLOID, volume 118)

Abstract

We investigated the solidification behaviour of thoroughly deionised aqueous suspensions of polystyrene latex spheres by various optical scattering methods. We found a dramatic increase in the nucleation rate densities with increasing particle number density. Crystalline and nanocrystalline samples showed two relaxation processes on widely separated time scales. For an index-matched suspension of perfluorinated particles an amorphous state was accessible with the glass-typical signature of frozen long-time relaxation. From our results we propose a route into the amorphous state different to that observed in hard-sphere suspensions. It seems that in charged-sphere systems the increased nucleation rate density triggers the appearance of a Bernal-type glass.

Key words

Colloids Charge spheres Glasses Light scattering Shear modulus 

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Copyright information

© Springer-Verlag 2001

Authors and Affiliations

  • H. -J. Schöpe
    • 1
  • T. Palberg
    • 1
  1. 1.Institut für Physik der Universität Mainz StaudingerMainzGermany

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