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Issue 29, 2015
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The role of curvature anisotropy in the ordering of spheres on an ellipsoid

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Abstract

Non-spherical emulsion droplets can be stabilized by densely packed colloidal particles adsorbed at their surface. In order to understand the microstructure of these surface packings, the ordering of hard spheres on ellipsoidal surfaces is determined through large scale computer simulations. Defects in the packing are shown generically to occur most often in regions of strong curvature; however, the relationship between defects and curvature is nontrivial, and the distribution of defects shows secondary maxima for ellipsoids of sufficiently high aspect ratio. As with packings on spherical surfaces, additional defects beyond those required by topology are observed as chains or “scars”. The transition point, however, is found to be softened by the anisotropic curvature which also partially orients the scars. A rich library of symmetric commensurate packings are identified for low particle number. We verify experimentally that ellipsoidal droplets of varying aspect ratio can be arrested by surface-adsorbed colloids.

Graphical abstract: The role of curvature anisotropy in the ordering of spheres on an ellipsoid

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Article information


Submitted
08 May 2015
Accepted
16 Jun 2015
First published
17 Jun 2015

Soft Matter, 2015,11, 5872-5882
Article type
Paper
Author version available

The role of curvature anisotropy in the ordering of spheres on an ellipsoid

C. J. Burke, B. L. Mbanga, Z. Wei, P. T. Spicer and T. J. Atherton, Soft Matter, 2015, 11, 5872
DOI: 10.1039/C5SM01118C

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