Synthesis and Characterization of Single-Domain Monocrystalline Magnetite Particles by Oxidative Aging of Fe(OH)2

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• 作者：Fernando Vereda ; Juan de Vicente ; Mar&iacute ; a del Puerto Morales ; Fernando Rull ; Roque Hidalgo-Á ; lvarez
• 刊名：Journal of Physical Chemistry C
• 出版年：2008
• 出版时间：April 17, 2008
• 年：2008
• 卷：112
• 期：15
• 页码：5843 - 5849
• 全文大小：270K
• 年卷期：v.112,no.15(April 17, 2008)
• ISSN：1932-7455

文摘

We report the fabrication of highly crystalline magnetite particles with a uniform morphology and a relativelyuniform average size of 54 nm. Particles were fabricated by oxidation of Fe(OH)₂ by nitrate in basic aqueousmedia. Characterization of the particles by means of transmission electron microscopy, Raman spectroscopy,X-ray and electron diffraction, and magnetometry showed that they were octahedral magnetic monodomainsof highly stoichiometric magnetite (unit formula was estimated to be Fe_2.985O₄), with room-temperatureferrimagnetic behavior and a saturation magnetization of 81.6 emu/g.