Facile synthesis of size-controllable monodispersed ferrite nanospheres

被引：202

作者：

Xuan, Shouhu ^{[1
]}

Wang, Feng ^{[1
]}

Wang, Yi-Xiang J. ^{[2
]}

Yu, Jimmy C. ^{[1
]}

Leung, Ken Cham-Fai ^{[1
]}

机构：

[1] Chinese Univ Hong Kong, Dept Chem, Ctr Novel Funct Mol, Shatin, Hong Kong, Peoples R China

[2] Chinese Univ Hong Kong, Prince Wales Hosp, Dept Diagnost Radiol & Organ Imaging, Shatin, Hong Kong, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2010年 / 20卷 / 24期

关键词：

COLLOIDAL NANOCRYSTAL CLUSTERS; SHAPE-CONTROLLED SYNTHESIS; IRON-OXIDE; FERRIMAGNETIC PARTICLES; MAGNETITE NANOPARTICLES; TEMPERATURE; GROWTH; ROUTE; FE3O4; GOLD;

D O I：

10.1039/c0jm00159g

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Monodispersed ferrite nanospheres were synthesized in an ethylene glycol/diethylene glycol (EG/DEG) binary solvent by using poly(vinylpyrrolidone) (PVP) as the surfactant. Particle size control can be attained by careful adjustment of the V(EG)/V(DEG) ratio. Different from previous reports, the magnetic studies of our iron ferrite (Fe(3)O(4)) nanospheres with various sizes from 20 to 300 nm reveal that they exhibit a similar magnetic saturation (M(s)) value. In particular, both the ferromagnetic and superparamagnetic Fe(3)O(4) nanospheres with similar M(s) can be selectively obtained by varying the H(2)O concentration in the reaction system. The magnetic resonance imaging (MRI) characterization indicates that the as-prepared superparamagnetic Fe(3)O(4) and ZnFe(2)O(4) nanospheres possess a T(2) relaxivity range that can be used as potential MRI contrast agents.

引用

页码：5086 / 5094

页数：9

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