Superparamagnetic cobalt ferrite nanoparticles synthesized by gamma irradiation

被引：10
|
作者：
Zorai, Amel [1 ,2 ]
Souici, Abdelhafid [1 ]
Dragoe, Diana [3 ]
Riviere, Eric [3 ]
Ouhenia, Salim [1 ]
Belloni, Jacqueline [2 ]
Mostafavi, Mehran [2 ]
机构：
[1] Univ Bejaia, Fac Sci Exactes, Lab Phys Chim Mat & Catalyse, Bejaia 06000, Algeria
[2] Univ Paris Saclay, Inst Chim Phys, UMR 8000, CNRS, Batiment 349,Campus Orsay,15 Ave Jean Perrin, F-91405 Orsay, France
[3] Univ Paris Saclay, Inst Chim Mol & Mat Orsay, CNRS, UMR 8182, Batiment Henri Moissan,19 Ave Sci, F-91400 Orsay, France
来源：
NEW JOURNAL OF CHEMISTRY | 2023年 / 47卷 / 05期
关键词：
RADIATION-INDUCED SYNTHESIS; MAGNETIC-PROPERTIES; THERMAL-DECOMPOSITION; XPS SPECTRA; CLUSTERS; TRANSFORMATION; NANOCRYSTALS; HYPERTHERMIA; PERFORMANCE; RADIOLYSIS;
D O I：
10.1039/d2nj05433g
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The radiolytic method is used to synthesize ultrasmall cobalt ferrite nanoparticles, CoFe2O4, exhibiting superparamagnetic properties. These systems are investigated by studying their properties at increasing dose of the irradiation process. These magnetic nanoparticles (MNPs) are characterized by X-ray diffraction (XRD), high-resolution transmission electronic microscopy (HRTEM), energy dispersive spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). The XRD analysis and HRTEM observations confirm the formation of ultra-small cobalt ferrite nanoparticles (NPs) of CoFe2O4 (6-9 nm) in the cubic spinel structure. The temperature-dependent magnetic measurements reveal that the NPs exhibit superparamagnetic properties with a high magnetization M-s similar to 70 Am-2 kg(-1) at 300 K and a very low coercivity (0.9 mT).
引用
收藏
页码：2626 / 2634
页数：9
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