J. Phys. IV France 07 (1997) C1-655-C1-657
Mechanism of Biological Fe3O4 Synthesis, in Relation to Ferrite PlatingM. Abe1 and Y. Tamaura2
1 Department of Physical Electronics, Tokyo Institute of Technology, O-okayama, Meguro-ku, Tokyo, 152, Japan
2 Research Center for Carbon Recycling and Utilization, O-okayama, Meguro-ku, Tokyo, 152, Japan
The mechanism of the magnetosome (Fe3O4) formations is elucidated from the basic findings on chemical reactions of iron oxides, especially those occurring in ferrite plating-a chemical process synthesizing spinel ferrite films from an aqueous solution. It is suggested that in both the biomineralization and the ferrite plating, (1) Fe2+ → Fe3+ oxidation by NaNO2 plays an essential role, (2) γ-FeOOH is formed as a precursor, and (3) Fe2+ ions are adsorbed on γ-FeOOH which is followed by spinel formation. It is also discussed how to synthesize ferrite films at room temperature by mimicking the biological Fe3O4 formation.
© EDP Sciences 1997