Formation Of Amorphous Iron‐Calcium Phosphate With High Stability

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2023
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Advanced Materials. Wiley. 2023, 35(33), 2301422. ISSN 0935-9648. eISSN 1521-4095. Available under: doi: 10.1002/adma.202301422
Zusammenfassung

Amorphous iron-calcium phosphate (Fe-ACP) plays a vital role in the mechanical properties of teeth of some rodents, which are very hard, but its formation process and synthetic route remain unknown. Here, we report the synthesis and characterization of an iron-bearing amorphous calcium phosphate in the presence of ammonium iron citrate (AIC). The iron is distributed homogeneously on the nanometer scale in the resulting particles. The prepared Fe-ACP particles can be highly stable in aqueous media, including water, simulated body fluid and acetate buffer solution (pH 4). In vitro study demonstrates that these particles have good biocompatibility and osteogenic properties. Subsequently, Spark Plasma Sintering (SPS) is utilized to consolidate the initial Fe-ACP powders. The results show that the hardness of the ceramics increases with the increase of iron content, but an excess of iron leads to a rapid decline in hardness. Calcium iron phosphate ceramics with a hardness of 4 GPa can be achieved, which is higher than that of human enamel. Furthermore, the ceramics composed of iron-calcium phosphates showed enhanced acid resistance. This study provides a novel route to prepare Fe-ACP, and presents the potential role of Fe-ACP in biomineralization and as starting material to fabricate acid-resistant high-performance bioceramics.

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540 Chemie
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biomineralization, amorphous calcium phosphate, ammonium iron citrate, phase transformation
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ISO 690CHEN, Song, Dachuan LIU, Le FU, Bing NI, Zongkun CHEN, Jennifer KNAUS, Elena V. STURM, Bohan WANG, Helmut CÖLFEN, Bin LI, 2023. Formation Of Amorphous Iron‐Calcium Phosphate With High Stability. In: Advanced Materials. Wiley. 2023, 35(33), 2301422. ISSN 0935-9648. eISSN 1521-4095. Available under: doi: 10.1002/adma.202301422
BibTex
@article{Chen2023Forma-67053,
  year={2023},
  doi={10.1002/adma.202301422},
  title={Formation Of Amorphous Iron‐Calcium Phosphate With High Stability},
  number={33},
  volume={35},
  issn={0935-9648},
  journal={Advanced Materials},
  author={Chen, Song and Liu, Dachuan and Fu, Le and Ni, Bing and Chen, Zongkun and Knaus, Jennifer and Sturm, Elena V. and Wang, Bohan and Cölfen, Helmut and Li, Bin},
  note={Article Number: 2301422}
}
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