Large-scale synthesis and characterization of monodisperse Fe₃O₄ nanocrystals

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• 作者：Rongrong Shi ; Xiaohe Liu ; Guanhua Gao ; Ran Yi ; Guanzhou Qiu
• 关键词：Inorganic compounds ; Nanostructures ; Chemical synthesis ; Magnetic properties
• 刊名：Journal of Alloys and Compounds
• 出版年：2009
• 出版时间：19 October 2009
• 年：2009
• 卷：485
• 期：1-2
• 页码：548-553
• 全文大小：1859 K

文摘

Monodisperse Fe₃O₄ nanocrystals could be successfully synthesized in large quantities via a facile synthetic technique based on the pyrolysis of organometallic compound precursor in organic solvent by using oleic acid and oleylamine as capping ligands. The morphology and size of final products could be tuned by adjusting reaction parameters, such as molar ratio of OA:OAm, injection temperature, and kinds of surfactants. The phase structure, morphology and size of the products were characterized in detail by X-ray diffraction (XRD), transmission electron microscopy (TEM), selected area electron diffraction (SAED) and high-resolution transmission electron microscopy (HRTEM). Magnetic properties of Fe₃O₄ nanocrystals with different sizes were measured using vibrating sample magnetometer (VSM) at room temperature, which revealed size-dependent magnetic properties of as-prepared products.