Direct imaging of repulsive and attractive colloidal glasses
- 21 August 2006
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 125 (7), 074716
- https://doi.org/10.1063/1.2227386
Abstract
Coherent anti-Stokes Raman scattering microscopy is performed on glassy systems of poly(methylmethacrylate) colloidal particles in density- and refractive-index-matched solvents. Samples are prepared with varying amounts of linear polystyrene, which induces a depletion driven attraction between the nearly hard-sphere particles. Images collected over several hours confirm the existence of a reentrant glass transition. The images also reveal that the dynamics of repulsive and attractive glasses are qualitatively different. Colloidal particles in repulsive glasses exhibit cage rattling and escape, while those in attractive glasses are nearly static while caged but exhibit large displacements upon (infrequent) cage escape.Keywords
This publication has 56 references indexed in Scilit:
- Comparison of Dynamical Heterogeneity in Hard-Sphere and Attractive Glass FormersThe Journal of Physical Chemistry B, 2005
- Kinetic Glass Transition in a Micellar System with Short-Range Attractive InteractionPhysical Review Letters, 2000
- Three-Dimensional Direct Imaging of Structural Relaxation Near the Colloidal Glass TransitionScience, 2000
- Methods of Digital Video Microscopy for Colloidal StudiesJournal of Colloid and Interface Science, 1996
- Viscosity and Structural Relaxation in Suspensions of Hard-Sphere ColloidsPhysical Review Letters, 1995
- Phase behavior of a model colloid-polymer mixturePhysical Review E, 1995
- Glass transition in colloidal hard spheres: Measurement and mode-coupling-theory analysis of the coherent intermediate scattering functionPhysical Review E, 1994
- Colloids dispersed in polymer solutions. A computer simulation studyThe Journal of Chemical Physics, 1994
- Dynamic-light-scattering study of glasses of hard colloidal spheresPhysical Review E, 1993
- Scanning coherent anti-Stokes Raman microscopeOptics Letters, 1982