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A critical analysis of calcium carbonate mesocrystals

Title data

Kim, Yi-Yeoun ; Schenk, Anna S. ; Ihli, Johannes ; Kulak, Alexander N. ; Hetherington, Nicola B. J. ; Tang, Chiu C. ; Schmahl, Wolfgang ; Griesshaber, Erika ; Hyett, Geoffrey ; Meldrum, Fiona C.:
A critical analysis of calcium carbonate mesocrystals.
In: Nature Communications. Vol. 5 (11 July 2014) . - Art.Nr. 4341.
ISSN 2041-1723
DOI: https://doi.org/10.1038/ncomms5341

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Juniorprofessur Kolloidale Systeme > Juniorprofessur Kolloidale Systeme - Juniorprof. Dr. Anna Schenk
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Juniorprofessur Kolloidale Systeme
Result of work at the UBT: No
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 21 Feb 2017 12:41
Last Modified: 21 Feb 2017 12:41
URI: https://eref.uni-bayreuth.de/id/eprint/36166