| Abstract
| - Fe3O4 submicrometer crystals can befabricated by a simple polyol process. The microstructural transformationof Fe3O4 crystals can be controlled by changingthe concentration of KOH in polyols. These products show charmingmagnetic properties at room temperature.
- Different morphological single-crystal magnetites (Fe3O4) with a nanoporous structure, which exhibit excellentmagnetic properties, have been synthesized by a polyol process. Boththe type of polyol and the concentration of KOH play important rolesin the formation of various morphologies. Cubic, truncated-octahedral,and octahedral shapes can be prepared by changing the concentrationof the KOH solution in ethylene glycol. Sequentially, a series ofsubmicro magnetites have been successfully obtained in the shape ofspheres, truncated cubes, and equilateral octahedra by incrementallyadjusting the concentration of KOH in glycerol. All the samples areferromagnetic at 2 K but nearly paramagnetic at 300 K except the cubicsample. These Fe3O4 crystals may have a potentialapplication as magnetic carriers for drug targeting because of theirexcellent soft-magnetic properties.
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