Synthesis of pyramidal, cubical and truncated octahedral magnetite nanocrystals by controlling reaction heating rate

被引：18

作者：

Zhang, Ling ^{[2
,3
]}

Li, Qin ^{[1
]}

Liu, Shaomin ^{[1
]}

Ang, Ming ^{[1
]}

Tade, Moses O. ^{[1
]}

Gu, Hong-Chen ^{[2
]}

机构：

[1] Curtin Univ Technol, Dept Chem Engn, Ctr Proc Syst Engn, Perth, WA 6845, Australia

[2] Shanghai Jiao Tong Univ, Med X Res Inst, Shanghai 200030, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

来源：

ADVANCED POWDER TECHNOLOGY | 2011年 / 22卷 / 04期

关键词：

Crystal growth; Magnetite nanoparticles; Nanocrystal; Crystal shape; Reaction heating rate; SHAPE-CONTROLLED SYNTHESIS; SINGLE-CRYSTALLINE; SUPERLATTICES; NANOPARTICLES; MECHANISM; EVOLUTION; GROWTH;

D O I：

10.1016/j.apt.2010.07.014

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Pyramidal, cubical and truncated octahedral magnetite nanocrystals have been synthesized by thermal de-composition of iron (III) acetylacetone (Fe(acac)(3)) in the presence of oleic acid under various reaction rate controlled by heating rate. The magnetite nanocrystals were characterized by transmission electron microscopy (TEM) and X-ray diffraction (XRD). High-resolution transmission electron microscopy (HRTEM) was applied to reveal the structural information of single magnetite (Fe3O4) nanocrystals. Magnetization curves of the three types of magnetite nanocrystals show that the pyramidal crystals exhibit a slight hysteresis compared to the other two despite of the similar size range. The results suggest that in addition to the surfactant selective capping and varying reaction temperature, the reaction rate variation is also an effective means for controlling the morphology and functions of the magnetite nanocrystals. (C) 2010 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.

引用

页码：532 / 536

页数：5

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