期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 56, 期 14, 页码 4042-4046出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201610275
关键词
aggregation; amorphous iron oxide; clusters; crystal growth; self-assembly
资金
- Alexander von Humboldt Foundation
- National Science Foundation of China (NSFC) [21604024]
- Fonds der Chemischen Industrie
- Julich Supercomputing Centre [HKN000]
Despite numerous studies on the nucleation and crystallization of iron (oxyhydr)oxides, the roles of species developing during the early stages, especially primary clusters and intermediate amorphous particles, are still poorly understood. Herein, both ligand-free and ligand-protected amorphous iron oxide (AIO) clusters (<2 nm) were synthesized as precursors for magnetite formation. Thermal annealing can crystallize the clusters into magnetite particles, and AIO bulk phases with domains of pre-aligned clusters are found to be direct precursors to crystals, suggesting a non-classical aggregation-based pathway that differs from the reported oriented attachment or particle accretion mechanisms.
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