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Ripening-dominated crystallization in polydisperse hard-sphere-like colloids

Sara Iacopini, Thomas Palberg, and Hans Joachim Schöpe
Phys. Rev. E 79, 010601(R) – Published 28 January 2009

Abstract

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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  • Received 14 July 2008

DOI:https://doi.org/10.1103/PhysRevE.79.010601

©2009 American Physical Society

Authors & Affiliations

Sara Iacopini, Thomas Palberg, and Hans Joachim Schöpe

  • Institut für Physik, Johannes Gutenberg Universität Mainz, Staudingerweg 7, D-55128 Mainz, Germany

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Vol. 79, Iss. 1 — January 2009

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