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论文类型：期刊论文

发表时间：2017-02-01

发表刊物：JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

收录刊物：SCIE、EI

卷号：423

页面范围：111-117

ISSN号：0304-8853

关键字：Monodisperse; Superparamagnetic nanoclusters; 5-Sulfosalicylic acid; Mixed-solvent system

摘要：Monodispersed Fe3O4 nanoclusters were synthesized in a one-pot solvothermal route with 5-sulfosalicylic acid (SSA) as the functional ligand in a mixed-solvent system of diethylene glycol/ethylene glycol (DEG/EG). Nucleation and aggregation growth model was responsible for the formation of secondary structure of the clusters. In the process, the size of the clusters can be effectively controlled by varying the amounts of SSA and the volume ratio of DEG/EG. The nanoclusters exhibited superparamagnetic properties with high saturation magnetization value of about 68.7 emu g(-1) at room temperature. The water-soluble small-molecule SSA grafted on the surface of Fe3O4 nanocrystals rendered the superparamagnetic clusters dispersible in water, which is crucial for potential applications in biomedical fields.