Multiple Glassy States in a Simple Model System

Experiments, theory, and simulation were used to study glass formation in a simple model system composed of hard spheres with short-range attraction ("sticky hard spheres"). The experiments, using well-characterized colloids, revealed a reentrant glass transition line. Mode-coupling theory...

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Bibliographic Details
Published inScience (American Association for the Advancement of Science) Vol. 296; no. 5565; pp. 104 - 106
Main Authors Pham, K N, Puertas, A M, Bergenholtz, J, Egelhaaf, S U, Moussaïd, A, Pusey, P N, Schofield, A B, Cates, M E, Fuchs, M, Poon, W C K
Format Journal Article
LanguageEnglish
Published United States American Society for the Advancement of Science 05.04.2002
American Association for the Advancement of Science
The American Association for the Advancement of Science
Subjects
Analysis
Colloids
Computer Simulation
Crystals
Density
Fractions
Glass
Glass & glassware industry
Glass research
Light scattering
Material concentration
Materials science
Mechanics (Physics)
Particle physics
Physics
Polymers
Solids
Thermodynamic equilibrium
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Summary:Experiments, theory, and simulation were used to study glass formation in a simple model system composed of hard spheres with short-range attraction ("sticky hard spheres"). The experiments, using well-characterized colloids, revealed a reentrant glass transition line. Mode-coupling theory calculations and molecular dynamics simulations suggest that the reentrance is due to the existence of two qualitatively different glassy states: one dominated by repulsion (with structural arrest due to caging) and the other by attraction (with structural arrest due to bonding). This picture is consistent with a study of the particle dynamics in the colloid using dynamic light scattering.
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ISSN:0036-8075
1095-9203
DOI:10.1126/science.1068238