Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 113, Issue 36, Pages 15914-15920Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp9051243
Keywords
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Funding
- National Key Project of Fundamental Research [2005CB623605]
- National Natural Science Foundation of China [50572116, 5060249]
- Shanghai Nanotechnology Promotion Center [0652 nm022]
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Pseudocubic iron oxide nanoparticles with a narrow size distribution have been synthesized. These pseudocubic nanocrystals are found to be bound by {012} facets, whose surface energy is more than those of other common planes such as {014} planes. The morphology transformation was successfully achieved by adjusting the ratio of the concentration of the reagent from irregular spherical, quasi-rhombic, and truncated cubic, to finally pseudocubic. The magnetic property of these nanocrystals is found to be influenced by varying the concentration of sodium oleate and oleic acid. It is attributed to the generation of Fe2+ from Fe3+ reduced by the reductive ambience provided by the surfactant. It may become a simple route to prepare magnetic iron oxide without the addition of Fe2+ or reductive reagent to some extent.
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