Nanomaterials Laboratory, Far East University, Hsing-Shih, Tainan County, 74448, Taiwan, ROC.
Nanoscale Res Lett. 2009 Jul 30;4(11):1343-50. doi: 10.1007/s11671-009-9403-x.
Iron fatty acid complexes (IFACs) are prepared via the dissolution of porous hematite powder in hot unsaturated fatty acid. The IFACs are then decomposed in five different organic solvents under reflux conditions in the presence of the respective fatty acid. The XRD analysis results indicate that the resulting NPs comprise a mixture of wustite, magnetite, and maghemite phases. The solvents with a higher boiling point prompt the formation of larger NPs containing wustite as the major component, while those with a lower boiling point produce smaller NPs with maghemite as the major component. In addition, it is shown that unstable NPs with a mixed wustite-magnetite composition can be oxidized to pure maghemite by extending the reaction time or using an oxidizing agent.
铁脂肪酸配合物（IFACs）是通过将多孔赤铁矿粉末溶解在热不饱和脂肪酸中制备的。然后，在存在相应脂肪酸的情况下，将 IFACs 在五种不同的有机溶剂中回流条件下分解。XRD 分析结果表明，所得 NPs 由方铁矿、磁铁矿和磁赤铁矿相的混合物组成。沸点较高的溶剂促使形成含有方铁矿作为主要成分的较大 NPs，而沸点较低的溶剂则产生以磁赤铁矿为主要成分的较小 NPs。此外，还表明通过延长反应时间或使用氧化剂，可以将具有混合方铁矿-磁铁矿组成的不稳定 NPs 氧化为纯磁赤铁矿。
