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

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Title Synthesis of pyramidal, cubical and truncated octahedral magnetite nanocrystals by controlling reaction heating rate
Author Zhang, Ling; Li, Qin; Liu, Shaomin; Ang, Ming; Tade, Moses O.; Gu, Hong-Chen
Journal Name Advanced Powder Technology
Year Published 2011
Place of publication Netherlands
Publisher Elsevier
Abstract 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.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1016/j.apt.2010.07.014
Volume 22
Issue Number 4
Page from 532
Page to 536
ISSN 0921-8831
Date Accessioned 2012-03-22; 2012-04-23T22:03:45Z
Date Available 2012-04-23T22:03:45Z
Research Centre Queensland Micro and Nanotechnology Centre
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Chemical Engineering; Colloid and Surface Chemistry; Powder and Particle Technology
URI http://hdl.handle.net/10072/44621
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1x

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