Disordered amorphous calcium carbonate from direct precipitation
© The Royal Society of Chemistry.Amorphous calcium carbonate (ACC) is known to play a prominent role in biomineralization. Different studies on the structure of biogenic ACCs have illustrated that they can have distinct short-range orders. However, the origin of so-called proto-structures in synthet...
| Main Authors: | , , , , , , |
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| Format: | Journal Article |
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The Royal Society of Chemistry
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/52703 |
| _version_ | 1848758990531461120 |
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| author | Farhadi Khouzani, M. Chevrier, D. Güttlein, P. Hauser, K. Zhang, P. Hedin, N. Gebauer, Denis |
| author_facet | Farhadi Khouzani, M. Chevrier, D. Güttlein, P. Hauser, K. Zhang, P. Hedin, N. Gebauer, Denis |
| author_sort | Farhadi Khouzani, M. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © The Royal Society of Chemistry.Amorphous calcium carbonate (ACC) is known to play a prominent role in biomineralization. Different studies on the structure of biogenic ACCs have illustrated that they can have distinct short-range orders. However, the origin of so-called proto-structures in synthetic and additive-free ACCs is not well understood. In the current work, ACC has been synthesised in iso-propanolic media by direct precipitation from ionic precursors, and analysed utilising a range of different techniques. The data suggest that this additive-free type of ACC does not resemble clear proto-structural motifs relating to any crystalline polymorph. This can be explained by the undefined pH value in iso-propanolic media, and the virtually instantaneous precipitation. Altogether, this work suggests that aqueous systems and pathways involving pre-nucleation clusters are required for the generation of clear proto-structural features in ACC. Experiments on the ACC-to-crystalline transformation in solution with and without ethanol highlight that polymorph selection is under kinetic control, while the presence of ethanol can control dissolution re-crystallisation pathways. |
| first_indexed | 2025-11-14T09:52:46Z |
| format | Journal Article |
| id | curtin-20.500.11937-52703 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:52:46Z |
| publishDate | 2015 |
| publisher | The Royal Society of Chemistry |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-527032017-09-13T15:40:23Z Disordered amorphous calcium carbonate from direct precipitation Farhadi Khouzani, M. Chevrier, D. Güttlein, P. Hauser, K. Zhang, P. Hedin, N. Gebauer, Denis © The Royal Society of Chemistry.Amorphous calcium carbonate (ACC) is known to play a prominent role in biomineralization. Different studies on the structure of biogenic ACCs have illustrated that they can have distinct short-range orders. However, the origin of so-called proto-structures in synthetic and additive-free ACCs is not well understood. In the current work, ACC has been synthesised in iso-propanolic media by direct precipitation from ionic precursors, and analysed utilising a range of different techniques. The data suggest that this additive-free type of ACC does not resemble clear proto-structural motifs relating to any crystalline polymorph. This can be explained by the undefined pH value in iso-propanolic media, and the virtually instantaneous precipitation. Altogether, this work suggests that aqueous systems and pathways involving pre-nucleation clusters are required for the generation of clear proto-structural features in ACC. Experiments on the ACC-to-crystalline transformation in solution with and without ethanol highlight that polymorph selection is under kinetic control, while the presence of ethanol can control dissolution re-crystallisation pathways. 2015 Journal Article http://hdl.handle.net/20.500.11937/52703 10.1039/c5ce00720h The Royal Society of Chemistry unknown |
| spellingShingle | Farhadi Khouzani, M. Chevrier, D. Güttlein, P. Hauser, K. Zhang, P. Hedin, N. Gebauer, Denis Disordered amorphous calcium carbonate from direct precipitation |
| title | Disordered amorphous calcium carbonate from direct precipitation |
| title_full | Disordered amorphous calcium carbonate from direct precipitation |
| title_fullStr | Disordered amorphous calcium carbonate from direct precipitation |
| title_full_unstemmed | Disordered amorphous calcium carbonate from direct precipitation |
| title_short | Disordered amorphous calcium carbonate from direct precipitation |
| title_sort | disordered amorphous calcium carbonate from direct precipitation |
| url | http://hdl.handle.net/20.500.11937/52703 |