Three-Dimensional Direct Imaging of Structural Relaxation Near the Colloidal Glass Transition

See allHide authors and affiliations

Science  28 Jan 2000:
Vol. 287, Issue 5453, pp. 627-631
DOI: 10.1126/science.287.5453.627

You are currently viewing the abstract.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution


Confocal microscopy was used to directly observe three-dimensional dynamics of particles in colloidal supercooled fluids and colloidal glasses. The fastest particles moved cooperatively; connected clusters of these mobile particles could be identified; and the cluster size distribution, structure, and dynamics were investigated. The characteristic cluster size grew markedly in the supercooled fluid as the glass transition was approached, in agreement with computer simulations; at the glass transition, however, there was a sudden drop in their size. The clusters of fast-moving particles were largest near the α-relaxation time scale for supercooled colloidal fluids, but were also present, albeit with a markedly different nature, at shorter β-relaxation time scales, in both supercooled fluid and glass colloidal phases.

  • * To whom correspondence should be addressed. E-mail: weeks{at}

View Full Text

Stay Connected to Science