论文标题
Fe $ _3 $ o $ _4 $纳米颗粒及其磁性的合成
Synthesis of Fe$_3$O$_4$ nanoparticles and their magnetic properties
论文作者
论文摘要
Fe $ _3 $ o $ _4 $磁性纳米颗粒（MNP）通过使用柠檬酸钠和油酸作为修饰剂合成。相位组成和微结构分析表明，柠檬酸钠和油酸已成功地嫁接到Fe $ _3 $ o $ $ _4 $ MNP的表面上。磁性行为表明，由于表面效应，修饰可以减少Fe $ _3 $ o $ _4 $ MNP的饱和磁化。 Fe $ _3 $ o $ _4 $由钠硝酸盐修饰和油酸修饰的MNP具有出色的分散能力，应归因于高表面能量的高表面能量和纳米颗粒的偶极吸引力。
Fe$_3$O$_4$ magnetic nanoparticles (MNPs) were synthesized by a co-precipitation method using sodium citrate and oleic acid as modifiers. Phase composition and microstructure analysis indicate that the sodium citrate and oleic acid have been successfully grafted onto the surface of Fe$_3$O$_4$ MNPs. The magnetic behaviors reveal that the modification can decrease the saturation magnetization of Fe$_3$O$_4$ MNPs due to the surface effect. Fe$_3$O$_4$ MNPs modified by sodiumcitrate and oleic acid show excellent dispersion capability, which should be ascribed to the great reduction of high surface energy and dipolar attraction of the nanoparticles.
