Shape-Controlled Synthesis and Magnetic Properties of Monodisperse Fe3O4 Nanocubes

被引：111

作者：

Gao, Guanhua ^{[1
]}

Liu, Xiaohe ^{[1
,2
]}

Shi, Rongrong ^{[1
]}

Zhou, Kechao ^{[2
]}

Shi, Youguo ^{[3
]}

Ma, Renzhi ^{[3
]}

Takayama-Muromachi, Eiji ^{[3
]}

Qiu, Guanzhou ^{[1
]}

机构：

[1] Cent S Univ, Dept Inorgan Mat, Changsha 410083, Hunan, Peoples R China

[2] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China

[3] Natl Inst Mat Sci, Int Ctr Mat Nanoarchitect, Tsukuba, Ibaraki 3050044, Japan

来源：

CRYSTAL GROWTH & DESIGN | 2010年 / 10卷 / 07期

基金：

中国国家自然科学基金;

关键词：

MR CONTRAST AGENTS; NANOPARTICLES; NANOCRYSTALS; DELIVERY; UNIFORM; MN; FE; CO;

D O I：

10.1021/cg900920q

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Monodisperse Fe3O4 nanocubes have been successfully synthesized by a facile solvothermal method at 260 degrees C in the presence of oleic acid and oleylamine. Well-defined assembly of uniform Fe3O4 nanocubes with an average size of 12 nm could be obtained without a size-selection process. The shape of as-prepared Fe3O4 nanoparticles could be reversibly interchanged between spheres and cubes by adjusting the reaction parameters. The phase structures, morphologies, and sizes of as-prepared products were investigated in detail by X-ray diffraction (X R D), transmission electron microscopy (TEM), and high-resolution transmission electron microscopy (HRTEM). The magnetic properties of Fe3O4 nanocubcs were measured by using a quantum design superconducting quantum interference device (SQUID). The magnetic study reveals that the assynthesized nanocubcs are ferromagnetic at 2 K while they are superparamagnetic at 300 K.

引用

页码：2888 / 2894

页数：7

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