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  Additives control the stability of amorphous calcium carbonate via two different mechanisms : surface adsorption versus bulk incorporation

Zou, Z., Yang, X., Albéric, M., Heil, T., Wang, Q., Pokroy, B., et al. (2020). Additives control the stability of amorphous calcium carbonate via two different mechanisms: surface adsorption versus bulk incorporation. Advanced Functional Materials, 30(23): 2000003. doi:10.1002/adfm.202000003.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0006-3E70-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-1952-1
Genre: Journal Article

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 Creators:
Zou, Zhaoyong1, Author              
Yang, Xiaofei, Author
Albéric, Marie2, Author              
Heil, Tobias3, Author              
Wang, Qihang, Author
Pokroy, Boaz, Author
Politi, Yael2, Author              
Bertinetti, Luca4, Author              
Affiliations:
1Wouter Habraken (Indep. Res.), Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2231638              
2Yael Politi, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_1863297              
3Nadezda V. Tarakina, Kolloidchemie, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2522693              
4Luca Bertinetti, Biomaterialien, Max Planck Institute of Colloids and Interfaces, Max Planck Society, ou_2379691              

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Free keywords: additives, amorphous calcium carbonate, biomineralization, crystallization, in situ characterization, stability
 Abstract: Abstract The mechanisms by which organisms control the stability of amorphous calcium carbonate (ACC) are yet not fully understood. Previous studies have shown that the intrinsic properties of ACC and its environment are critical in determining ACC stability. Here, the question, what is the effect of bulk incorporation versus surface adsorption of additives on the stability of synthetic ACC, is addressed. Using a wide range of in situ characterization techniques, it is shown that surface adsorption of poly(Aspartic acid) (pAsp) has a much larger stabilization effect than bulk incorporation of pAsp and only 1.5% pAsp could dramatically increase the crystallization temperature from 141 to 350 °C. On the contrary, surface adsorption of PO43- ions and OH- ions does not effectively stabilize ACC. However, bulk incorporation of these ions could significantly improve the ACC stability. It is concluded that the stabilization mechanism of pAsp is entirely different from that of PO43- ions and OH- ions: while pAsp is effectively inhibiting calcite nucleation at the surface of ACC particle, the latter acts to modify the ion mobility and delay crystal propagation. Thus, new insights on controlling the stability and crystallization processes of metastable amorphous materials are provided.

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Language(s): eng - English
 Dates: 2020-04-092020
 Publication Status: Published in print
 Pages: -
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 Identifiers: DOI: 10.1002/adfm.202000003
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Title: Advanced Functional Materials
  Other : Adv. Funct. Mater.
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH Verlag GmbH
Pages: - Volume / Issue: 30 (23) Sequence Number: 2000003 Start / End Page: - Identifier: ISSN: 1616-301X