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Issue 8, 2011
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Facile solvothermal synthesis of monodisperse Fe3O4 nanocrystals with precise size control of one nanometre as potential MRI contrast agents

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Abstract

A facile solvothermal approach was used to synthesize ultrasmall monodisperse magnetite (Fe3O4) nanoparticles with precise size control of one nanometre, in which iron acetylacetonate [Fe(acac)3] acted as the iron source, n-octylamine as the reductant, and n-octanol as the solvent. By varying the volume ratios of n-octylamine to n-octanol, 4 nm, 5 nm and 6 nm Fe3O4 nanoparticles were obtained. Compared with the popular thermal decomposition methods to Fe3O4 nanoparticles, this solvothermal process, without the need for a N2 atmosphere and reflux conditions, was more convenient. The intrinsic crystallography of the obtained magnetite nanoparticles was characterized by XRD and HRTEM, the particle size, shape, superlattice and self-assembly were observed by TEM, and the surface of nanoparticles was studied by FT-IR and XPS. The magnetic properties of the different particle sizes were measured at room temperature. Furthermore, the relaxation efficiency of three samples as high-performance magnetic resonance imaging contrast agents depending on the particle size was investigated in cetyltrimethyl ammonium bromide (CTAB) aqueous solution.

Graphical abstract: Facile solvothermal synthesis of monodisperse Fe3O4 nanocrystals with precise size control of one nanometre as potential MRI contrast agents

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Publication details

The article was received on 02 Sep 2010, accepted on 22 Nov 2010 and first published on 12 Jan 2011


Article type: Paper
DOI: 10.1039/C0JM02913K
Citation: J. Mater. Chem., 2011,21, 2476-2481
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    Facile solvothermal synthesis of monodisperse Fe3O4 nanocrystals with precise size control of one nanometre as potential MRI contrast agents

    Y. Tian, B. Yu, X. Li and K. Li, J. Mater. Chem., 2011, 21, 2476
    DOI: 10.1039/C0JM02913K

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