To produce multi-dopant ferrite nanoparticles, the ‘Extended LaMer’ and seed-mediated growth techniques were combined by first utilizing traditional thermal decomposition of metal acetylacetonates to produce seed particles, followed by a continuous injection of metal oleate precursors to increase the volume of the seed particles. With the choice of precursors for the seeding and dripping stage, we successfully synthesized particles with manganese precursor for seeding and cobalt precursor for dripping (Mn_0.18Co_1.04Fe_1.78O₄, 17.6 3.3 nm), and particles with cobalt precursors for seeding and manganese precursors for dripping (Mn_0.31Co_0.74Fe_1.95O₄, 19.0 1.9 nm). Combining transmission electron microscopy, energy-dispersive x-ray spectroscopy, x-ray diffraction, and vibrating sample magnetometry, we conclude that the seed-mediated drip method is a viable method to produce multi-dopant ferrite nanoparticles, and the size of the particles was mostly determined by the seeding stage, while the magnetic properties were more affected by the dripping stage.

为了生产多掺杂铁氧体纳米颗粒，“扩展 LaMer”和种子介导的生长技术相结合，首先利用金属乙酰丙酮化物的传统热分解来生产种子颗粒，然后连续注入金属油酸盐前体以增加体积种子颗粒。通过对晶种和滴落阶段前驱体的选择，我们成功地合成了具有用于晶种的锰前体和用于滴落的钴前体的颗粒 (Mn _0.18 Co _1.04 Fe _1.78 O ₄ , 17.6 3.3 nm)，以及具有用于晶种和锰的钴前体的颗粒用于滴落的前体（Mn _0.31 Co _0.74 Fe _1.95 O ₄, 19.0 1.9 纳米）。结合透射电子显微镜、能量色散 X 射线光谱、X 射线衍射和振动样品磁力计，我们得出结论，种子介导的滴注法是生产多掺杂铁氧体纳米粒子的可行方法，并且粒子的大小主要受播种期决定，而磁性能受滴落期影响较大。