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Issue 11, 2016
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Self-assembly, structural order and mechanism of γ-Fe2O3@SiO2 ellipsoids induced by magnetic fields

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Abstract

Monodispersed γ-Fe2O3@SiO2 ellipsoids are prepared by the three-step approach of hydrothermal synthesis, reduction–oxidation and SiO2 coating. The magnetic field induced self-assembly processes are designed and carried out in different conditions. Influences of magnetic field strength, solvent, temperature, concentration and substrate are carefully investigated and evaluated by SEM and reflective spectra. The optimal self-assembly conditions of γ-Fe2O3@SiO2 ellipsoid ordered structures are confirmed to be dispersed in ethanol at 0.06 mol L−1 followed by evaporation on a glass substrate in a magnetic field of strength 5000 Oe at 35 °C. Finally, an air–liquid interfacial mechanism is suggested to understand the self-assembly processes.

Graphical abstract: Self-assembly, structural order and mechanism of γ-Fe2O3@SiO2 ellipsoids induced by magnetic fields

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Publication details

The article was received on 05 May 2016, accepted on 23 Sep 2016 and first published on 26 Sep 2016


Article type: Paper
DOI: 10.1039/C6NJ01415A
Citation: New J. Chem., 2016,40, 9520-9525
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    Self-assembly, structural order and mechanism of γ-Fe2O3@SiO2 ellipsoids induced by magnetic fields

    X. Zhang, Y. Niu, J. Zhao and Y. Li, New J. Chem., 2016, 40, 9520
    DOI: 10.1039/C6NJ01415A

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