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Crystals 2019, 9(1), 7;

Reversed Crystal Growth

EaStCHEM, School of Chemistry, University of St Andrews, Fife KY16 9ST, UK
Received: 28 November 2018 / Revised: 10 December 2018 / Accepted: 17 December 2018 / Published: 22 December 2018
(This article belongs to the Special Issue Non-Classical Crystal Growth)
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In the last decade, a reversed growth route has been found in many crystal growth processes. In these systems, a single crystal does not develop from a single nucleus. The precursor molecules/ions or nanocrystallites aggregate into some large amorphous or polycrystalline particles. Multiple-nucleation on the surface of the amorphous particles or surface re-crystallization of the polycrystalline particles then takes place, forming a single crystal shell with a regular morphology. Finally, the crystallization extends from the surface to the core to form single crystals. This non-classical crystal growth route often results in some special morphologies, such as core-shell structures, hollow single crystals, sandwich structures, etc. This article gives a brief review of the research into reversed crystal growth and demonstrates that investigation of detailed mechanisms of crystal growth enables us to better understand the formation of many novel morphologies of the crystals. Some unsolved problems are also discussed. View Full-Text
Keywords: crystal growth; crystal morphology; electron microscopy; nucleation; core-shell structure; hollow crystal crystal growth; crystal morphology; electron microscopy; nucleation; core-shell structure; hollow crystal

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Zhou, W. Reversed Crystal Growth. Crystals 2019, 9, 7.

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