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Fabrication, magnetic properties and self-assembly of hierarchical crystalline hexapod magnetites

RSC Advances, ISSN: 2046-2069, Vol: 2, Issue: 10, Page: 4329-4334
2012
  • 12
    Citations
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  • 13
    Captures
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Metrics Details

  • Citations
    12
    • Citation Indexes
      12
  • Captures
    13

Article Description

We report a facile and surfactant-free solvothermal approach for the shape controlled synthesis of magnetite (Fe O ). Hierarchical branched hexapod magnetites with various secondary structures can be prepared from ferrocene by using different solvents and tailoring experimental parameters. The as-prepared hexapods were characterized by X-ray diffraction, room temperature Fe Mössbauer spectroscopy, and scanning and transmission electron microscopy. Compared with bulk magnetite, the obtained Fe O hexapods are single crystals and exhibit different ferrimagnetic behavior with relatively high specific saturation magnetization (90-128 emu g ) and large coercivity (223-238 Oe) values depending on their size and morphology. Self-organization of the shape-anisotropic hexapod crystals has been achieved for the first time by evaporation-mediated assembly. The well-defined hexapod Fe O crystals will be attractive as promising building blocks for the bottom-up design of advanced materials and devices which may have applications in many fields. © The Royal Society of Chemistry 2012.

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