Controllable synthesis and magnetic property of Fe/Fe3O4 polyhedron synthesized by solvothermal method

Abstract

Fe/Fe 3 O 4 nano-cubes and nano-octahedrons have been successfully synthesized by employing a facile solvothermal method at 180°C in the presence of ethylene glycol (EG). Well-defined assembly of uniform Fe/Fe 3 O 4 with an average size of 400 nm could be obtained without a size-selection process. X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy were used to characterize the structure and morphology of the products. The magnetic properties of Fe/Fe 3 O 4 nanocomposite were measured by using a vibrating sample magnetometer. The result of magnetic characterization reveals that the magnetic polyhedrons exhibit a ferromagnetic behavior and possess high saturation magnetization. It is expected that these magnetic polyhedron with uniform size would have potential applications in recording media and electrode materials.

Shape-controlled synthesis of magnetic Fe3O4 nanoparticles with different iron precursors and capping agents

“…2b ) match with those of Fe 3 O 4 MNPs in the literature. 26 The diffraction peaks at 2 θ = 44° assign to the fcc structure of Fe 3 O 4 nanoparticles. For both samples, X-ray diffraction peaks corresponding to Bragg diffractions of the crystal planes of (111), (220), (311), (222), (400), (422) and (511) agree with standard JCPDS patterns, which indicates the high crystal phase purity of synthesized Fe 3 O 4 , (from Pdf reference code, Fig.…”

Magnetoliposomes as model for signal transmission

“…The XRD patterns confirmed that magnetite has formed under the conditions applied. The Bragg reflection peaks are (1 1 1), (2 2 0), (3 1 1), (4 0 0), (5 1 1) and (4 4 0) and the positions and relative intensities can be indexed to a face-centred cubic structure of magnetite with lattice parameters a = 8.42 ± 0.20 Å (JCPDS 85-1436), a = 8.40 Å [32]. The magnetic properties of magnetite nanoparticles were analysed by SQUID-VSM at room temperature (figure 2 d ).…”