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American Physical Society, Physical Review Letters, 20(99)

DOI: 10.1103/physrevlett.99.205701

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Spinodal Decomposition in a Model Colloid-Polymer Mixture in Microgravity

Journal article published in 2007 by A. E. Bailey, I.-N.-C. Zin Technologies, University of Edinburgh, W. C. K. Poon ORCID, Rebecca J. Christianson, A. B. Schofield ORCID, U. Gasser, V. Prasad, S. Manley, P. N. Segre, Luca Cipelletti, W. V. Meyer, M. P. Doherty, S. Sankaran, A. L. Jankovsky and other authors.
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Abstract

We study phase separation in a deeply quenched colloid-polymer mixture in microgravity on the International Space Station using small-angle light scattering and direct imaging. We observe a clear crossover from early-stage spinodal decomposition to late-stage, interfacial-tension-driven coarsening. Data acquired over 5 orders of magnitude in time show more than 3 orders of magnitude increase in domain size, following nearly the same evolution as that in binary liquid mixtures. The late-stage growth approaches the expected linear growth rate quite slowly.