Synthesis of Stable Aragonite Superstructures by a Biomimetic Crystallization Pathway

Selective nucleation of aragonite can be achieved at ambient conditions in water by using block copolymer microgels at a very low concentration (0.1 ppm). One polymer template particle is sufficient to control the nucleation of a ring of aragonite single crystals, which propagate into a sheaf struct...

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Bibliographic Details
Published in:Angewandte Chemie (International ed.) 2005-09, Vol.44 (37), p.6004-6009
Main Authors: Nassif, Nadine, Gehrke, Nicole, Pinna, Nicola, Shirshova, Natasha, Tauer, Klaus, Antonietti, Markus, Cölfen, Helmut
Format: Article
Language:English
Subjects:
block copolymers
calcium carbonate
Calcium Carbonate - chemical synthesis
Calcium Carbonate - chemistry
Crystallization
Crystallography, X-Ray
microgels
Microscopy, Electron, Scanning
Microscopy, Electron, Transmission
Molecular Mimicry
nucleation
polymorphism
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Summary:Selective nucleation of aragonite can be achieved at ambient conditions in water by using block copolymer microgels at a very low concentration (0.1 ppm). One polymer template particle is sufficient to control the nucleation of a ring of aragonite single crystals, which propagate into a sheaf structure (see SEM image). Each aragonite crystal is protected by an outer amorphous layer that results in prolonged stability of the aragonite.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.200500081