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Issue 18, 2017
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Assembly of hard spheres in a cylinder: a computational and experimental study

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Abstract

Hard spheres are an important benchmark of our understanding of natural and synthetic systems. In this work, colloidal experiments and Monte Carlo simulations examine the equilibrium and out-of-equilibrium assembly of hard spheres of diameter σ within cylinders of diameter σD ≤ 2.82σ. Although phase transitions formally do not exist in such systems, marked structural crossovers can nonetheless be observed. Over this range of D, we find in simulations that structural crossovers echo the structural changes in the sequence of densest packings. We also observe that the out-of-equilibrium self-assembly depends on the compression rate. Slow compression approximates equilibrium results, while fast compression can skip intermediate structures. Crossovers for which no continuous line-slip exists are found to be dynamically unfavorable, which is the main source of this difference. Results from colloidal sedimentation experiments at low diffusion rate are found to be consistent with the results of fast compressions, as long as appropriate boundary conditions are used.

Graphical abstract: Assembly of hard spheres in a cylinder: a computational and experimental study

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Publication details

The article was received on 14 Feb 2017, accepted on 02 Mar 2017 and first published on 09 Mar 2017


Article type: Paper
DOI: 10.1039/C7SM00316A
Citation: Soft Matter, 2017,13, 3296-3306
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    Assembly of hard spheres in a cylinder: a computational and experimental study

    L. Fu, C. Bian, C. W. Shields, D. F. Cruz, G. P. López and P. Charbonneau, Soft Matter, 2017, 13, 3296
    DOI: 10.1039/C7SM00316A

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