Particle dynamics in colloidal suspensions above and below the glass-liquid re-entrance transition

A. Latka, Y. Han, A. M. Alsayed, Andrew B Schofield, A. G. Yodh, P. Habdas

Research output: Contribution to journalArticlepeer-review

Abstract

We study colloidal particle dynamics of a model glass system using confocal and fluorescence microscopy as the sample evolves from a hard-sphere glass to a liquid with attractive interparticle interactions. The transition from hard-sphere glass to attractive liquid is induced by short-range depletion forces. The development of liquid-like structure is indicated by particle dynamics. We identify particles which exhibit substantial motional events and characterize the transition using the properties of these motional events. As samples enter the attractive liquid region, particle speed during these motional events increases by about one order of magnitude, and the particles move more cooperatively. Interestingly, colloidal particles in the attractive liquid phase do not exhibit significantly larger displacements than particles in the hard-sphere glass. Copyright (C) EPLA, 2009

Original languageEnglish
Article number58001
Pages (from-to)-
Number of pages5
JournalEurophysics Letters
Volume86
Issue number5
DOIs
Publication statusPublished - Jun 2009

Keywords

  • MODEL SYSTEM
  • HARD-SPHERE
  • HETEROGENEITIES
  • RELAXATION

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