Colloidal synthesis and characterization of ultrasmall perovskite GdFeO3 nanocrystals

被引：38

作者：

Soderlind, Fredrik ^{[1
]}

Fortin, Marc A. ^{[1
,2
,3
]}

Petoral, Rodrigo M., Jr. ^{[1
]}

Klasson, Anna ^{[4
,5
]}

Veres, Teodor ^{[6
]}

Engstrom, Maria ^{[4
,5
]}

Uvdal, Kajsa ^{[1
]}

Kall, Per-Olov ^{[1
]}

机构：

[1] Linkoping Univ, IFM, Dept Phys Chem & Biol, SE-58183 Linkoping, Sweden

[2] Univ Laval, Ste Foy, PQ G1K 7P4, Canada

[3] Univ Laval, CHUQ, Unite Bioingn & Biotechnol, Ste Foy, PQ G1K 7P4, Canada

[4] Linkoping Univ, CMIV, SE-58185 Linkoping, Sweden

[5] Linkoping Univ, Dept Radiol, SE-58185 Linkoping, Sweden

[6] Natl Res Council Canada, IMI, Boucherville, PQ J4B 6Y4, Canada

来源：

NANOTECHNOLOGY | 2008年 / 19卷 / 08期

关键词：

D O I：

10.1088/0957-4484/19/8/085608

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Synthesis of very small (about 4 nm) perovskite structured gadolinium orthoferrite nanoparticles (GdFeO3) was performed by the polyol method. The material shows promising relaxivity properties and potential as a contrast agent in magnetic resonance imaging. The perovskite nanoparticles were characterized by x-ray diffraction, transmission electron microscopy, energy dispersive x-ray spectroscopy, Fourier transform infrared spectroscopy, magnetic resonance, and magnetization measurements. Upon heating in air at 800 degrees C for 3 h the size of the crystals increased to about 40 nm. The crystalline structure of the heat treated compound is in good agreement with perovskite GdFeO3 as the primary product. Contributions from various secondary phases were also identified, including one hitherto unknown phase with the suggested composition 'Gd3FeO6' and isostructural with Gd3GaO6. The novel 'Gd3FeO6' phase appears to be kinetically stabilized in the nano state.

引用

页数：8

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