Colloidal glass transition observed in confinement
arXiv:cond-mat/0601648 · doi:10.1103/PhysRevLett.99.025702
Abstract
We study a colloidal suspension confined between two quasi-parallel walls as a model system for glass transitions in confined geometries. The suspension is a mixture of two particle sizes to prevent wall-induced crystallization. We use confocal microscopy to directly observe the motion of colloidal particles. This motion is slower in confinement, thus producing glassy behavior in a sample which is a liquid in an unconfined geometry. For higher volume fraction samples (closer to the glass transition), the onset of confinement effects occurs at larger length scales.
arXiv comment4 pages, 3 figures
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