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A critical analysis of calcium carbonate mesocrystals

The term mesocrystal has been widely used to describe crystals that form by oriented assembly, and that exhibit nanoparticle substructures. Using calcite crystals co-precipitated with polymers as a suitable test case, this article looks critically at the concept of mesocrystals. Here we demonstrate...

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Autores principales: Kim, Yi-Yeoun, Schenk, Anna S., Ihli, Johannes, Kulak, Alex N., Hetherington, Nicola B. J., Tang, Chiu C., Schmahl, Wolfgang W., Griesshaber, Erika, Hyett, Geoffrey, Meldrum, Fiona C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Pub. Group 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4104461/
https://www.ncbi.nlm.nih.gov/pubmed/25014563
http://dx.doi.org/10.1038/ncomms5341
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author Kim, Yi-Yeoun
Schenk, Anna S.
Ihli, Johannes
Kulak, Alex N.
Hetherington, Nicola B. J.
Tang, Chiu C.
Schmahl, Wolfgang W.
Griesshaber, Erika
Hyett, Geoffrey
Meldrum, Fiona C.
author_facet Kim, Yi-Yeoun
Schenk, Anna S.
Ihli, Johannes
Kulak, Alex N.
Hetherington, Nicola B. J.
Tang, Chiu C.
Schmahl, Wolfgang W.
Griesshaber, Erika
Hyett, Geoffrey
Meldrum, Fiona C.
author_sort Kim, Yi-Yeoun
collection PubMed
description The term mesocrystal has been widely used to describe crystals that form by oriented assembly, and that exhibit nanoparticle substructures. Using calcite crystals co-precipitated with polymers as a suitable test case, this article looks critically at the concept of mesocrystals. Here we demonstrate that the data commonly used to assign mesocrystal structure may be frequently misinterpreted, and that these calcite/polymer crystals do not have nanoparticle substructures. Although morphologies suggest the presence of nanoparticles, these are only present on the crystal surface. High surface areas are only recorded for crystals freshly removed from solution and are again attributed to a thin shell of nanoparticles on a solid calcite core. Line broadening in powder X-ray diffraction spectra is due to lattice strain only, precluding the existence of a nanoparticle sub-structure. Finally, study of the formation mechanism provides no evidence for crystalline precursor particles. A re-evaluation of existing literature on some mesocrystals may therefore be required.
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spelling pubmed-41044612014-07-22 A critical analysis of calcium carbonate mesocrystals Kim, Yi-Yeoun Schenk, Anna S. Ihli, Johannes Kulak, Alex N. Hetherington, Nicola B. J. Tang, Chiu C. Schmahl, Wolfgang W. Griesshaber, Erika Hyett, Geoffrey Meldrum, Fiona C. Nat Commun Article The term mesocrystal has been widely used to describe crystals that form by oriented assembly, and that exhibit nanoparticle substructures. Using calcite crystals co-precipitated with polymers as a suitable test case, this article looks critically at the concept of mesocrystals. Here we demonstrate that the data commonly used to assign mesocrystal structure may be frequently misinterpreted, and that these calcite/polymer crystals do not have nanoparticle substructures. Although morphologies suggest the presence of nanoparticles, these are only present on the crystal surface. High surface areas are only recorded for crystals freshly removed from solution and are again attributed to a thin shell of nanoparticles on a solid calcite core. Line broadening in powder X-ray diffraction spectra is due to lattice strain only, precluding the existence of a nanoparticle sub-structure. Finally, study of the formation mechanism provides no evidence for crystalline precursor particles. A re-evaluation of existing literature on some mesocrystals may therefore be required. Nature Pub. Group 2014-07-11 /pmc/articles/PMC4104461/ /pubmed/25014563 http://dx.doi.org/10.1038/ncomms5341 Text en Copyright © 2014, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Kim, Yi-Yeoun
Schenk, Anna S.
Ihli, Johannes
Kulak, Alex N.
Hetherington, Nicola B. J.
Tang, Chiu C.
Schmahl, Wolfgang W.
Griesshaber, Erika
Hyett, Geoffrey
Meldrum, Fiona C.
A critical analysis of calcium carbonate mesocrystals
title A critical analysis of calcium carbonate mesocrystals
title_full A critical analysis of calcium carbonate mesocrystals
title_fullStr A critical analysis of calcium carbonate mesocrystals
title_full_unstemmed A critical analysis of calcium carbonate mesocrystals
title_short A critical analysis of calcium carbonate mesocrystals
title_sort critical analysis of calcium carbonate mesocrystals
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4104461/
https://www.ncbi.nlm.nih.gov/pubmed/25014563
http://dx.doi.org/10.1038/ncomms5341
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