A.-W. Xu thanks the Alexander von Humboldt Foundation for granting a Research Fellowship. This work was partially supported by the National Natural Science Foundation of China (20371053) and the Guangdong Province NNSF (031574). Supporting Information is available online from Wiley InterScience or from the author.
Uniform Hexagonal Plates of Vaterite CaCO3 Mesocrystals Formed by Biomimetic Mineralization†
Article first published online: 14 MAR 2006
Copyright © 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Advanced Functional Materials
Volume 16, Issue 7, pages 903–908, May, 2006
How to Cite
Xu, A.-W., Antonietti, M., Cölfen, H. and Fang, Y.-P. (2006), Uniform Hexagonal Plates of Vaterite CaCO3 Mesocrystals Formed by Biomimetic Mineralization. Adv. Funct. Mater., 16: 903–908. doi: 10.1002/adfm.200500716
- Issue published online: 21 APR 2006
- Article first published online: 14 MAR 2006
- Manuscript Accepted: 12 OCT 2005
- Manuscript Received: 16 AUG 2005
- Calcium carbonate, vaterite;
- Crystal growth
Vaterite mesocrystals with hexagonal morphology and uniform size have been successfully synthesized in the presence of a N-trimethylammonium derivative of hydroxyethyl cellulose via aggregation-mediated crystallization using a simple gas-diffusion method. The uniform hexagonal plates display sharp facets and edges, even though they are formed by the aggregation of nanocrystals. The results demonstrate that each vaterite plate can be explained as consisting of aggregates of nanoparticles that share the same three-dimensional orientation. A mechanism for the formation of hexagonal vaterite mesocrystals made of primary nanoparticles and hexagonal units is also presented. An understanding of the mesoscale transformation process will be helpful in controlling the aggregation-driven formation of complex higher-order structured materials and will provide new insights into biomineralization mechanisms. For example, the spines of sea urchins can be discussed within the framework of the mesocrystal concept. This study could provide an additional tool for designing advanced materials and could be used for the synthesis of more complex crystalline three-dimensional structures.