Abstract
At 30 °C magnetite (Fe3O4) films were successfully grown, ∼5 μm in thickness, by flowing for 20 h a mixed gas of O2/N2=1/2000 on lipid monomolecular layers of arachic acid spread on an aqueous solution of FeCl2. The ordered array of the OH groups of the lipid layer stimulated the nucleation and growth of the Fe3O4 films, similar to that proposed for the bacterial magnetosome (Fe3O4 crystals) synthesis in which the OH groups on the cytoplasmic membrane stimulates the surface growth of Fe3O4. The Fe3O4 films obtained in this study contained a small amount of ferric hydroxyl impurity phases of α-FeOOH and γ-FeOOH, as shown by x-ray and Mössbauer analyses.
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