Journal
PHYSICAL REVIEW E
Volume 79, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevE.79.010601
Keywords
colloids; crystal growth from melt; crystallisation
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Funding
- Forschungsfond der Universitat Mainz, [DFG SFB-TR6]
- DFG SPP 1296
- Marie Curie Research and Training Network [MRTN-CT-2003-504712]
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We report on the crystal growth scenario in gravity-matched, polydisperse hard-sphere-like colloids at increasing particle concentration. In the fluid-crystal coexistence region, the crystal size as a function of time shows two separate regimes corresponding to crystal growth and crystal ripening. At higher supersaturation the crystal size grows according to the same power law through the whole experimental window of a few days: crystal growth and ripening merge together. We show that our observations cannot be explained by considering the slowing down of single-particle dynamics due to increasing volume fraction. We suggest that size fractionation occurring at the crystal-fluid interface is the dominant mechanism.
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