We have demonstrated the synthesis of high-quality monocrystalline magnetite nanocubes through the introduction of palmitic acid as surfactant in a thermal decomposition synthesis of an organic Fe precursor. Unlike the standard thermal decomposition synthesis route, we report the avoid of the reducing agent and a modification in the synthesis heating ramp. Structural and magnetic properties were investigated showing well defined cubic shaped nanoparticles with a ∼ 40 nm edge and magnetic features close to bulk magnetite. We associate the bulk-like magnetic performance and properties to the highly crystalline structure of the nanocubes. In addition, we introduce a facile way to make a ligand exchange of nanocubes initial surfactant to citric acid in order to obtain biocompatible hydrophilic nanocubes. The potential application of the obtained sample in magnetic hyperthermia therapy is shown through calorimetric heating measurements on liquid dispersions of the nanoc...

中文翻译：

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具有高质量结晶度和块状磁性特征​​的棕榈酸涂层磁铁矿纳米立方体

我们已经证明了通过在有机铁前体的热分解合成中引入棕榈酸作为表面活性剂，可以合成高质量的单晶磁铁矿纳米晶。与标准的热分解合成路线不同，我们报告了避免使用还原剂和对合成加热坡道进行了修改。研究了结构和磁性能，显示了边缘清晰的立方纳米粒子，其边缘约为40 nm，磁特征接近块状磁铁矿。我们将大块的磁性性能和特性与纳米立方体的高度结晶结构相关联。此外，我们引入了一种简便的方法来使纳米立方体的初始表面活性剂与柠檬酸进行配体交换，从而获得生物相容的亲水性纳米立方体。