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Issue 45, 2017
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Soft polyhedral particles based on cubic liquid crystalline emulsion droplets

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Abstract

Soft polyhedral particles based on variations of the cubic symmetry group are produced from a precursor emulsion by extracting solvent to grow facets on the droplets. The droplets transform into liquid crystals with solid-like rheology and controlled size and shape. Small-angle X-ray scattering confirms a bicontinuous cubic liquid crystalline phase forms from aqueous glycerol monoolein and is responsible for the particle faceting observed. Different polyhedra are produced by varying face growth rates through control of precursor droplet size, system temperature, and solubilization and adsorption of guest molecules. More exotic faceted shapes can be formed by the soft particles by applying asymmetric solvent removal gradients and by deforming the precursor droplets into, for example, ellipsoids before crystallization. The method is a powerful means to produce soft polyhedra, using continuous microfluidic or other approaches, or to act as templates for hard polyhedral particle synthesis.

Graphical abstract: Soft polyhedral particles based on cubic liquid crystalline emulsion droplets

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Publication details

The article was received on 31 Jul 2017, accepted on 25 Oct 2017 and first published on 25 Oct 2017


Article type: Paper
DOI: 10.1039/C7SM01521F
Citation: Soft Matter, 2017,13, 8492-8501
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    Soft polyhedral particles based on cubic liquid crystalline emulsion droplets

    H. Wang, P. B. Zetterlund, C. Boyer, B. J. Boyd, S. W. Prescott and P. T. Spicer, Soft Matter, 2017, 13, 8492
    DOI: 10.1039/C7SM01521F

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