Synthesis and magnetic properties of monodisperse magnetite nanocubes

Abstract

Synthesis and magnetic properties of gold coated iron oxide nanoparticles J. Appl. Phys. 105, 07B504 (2009); 10.1063/1.3059607 Synthesis of self-assembled monodisperse 3 nm FePd nanoparticles: Phase transition, magnetic study, and surface effectThe monodisperse Fe 3 O 4 nanocubes with controllable sizes from 6.5 to 30.0 nm have been synthesized in one pot. The shape-induced texture of the self-assembled nanocube superlattices has been deposited onto substrates by a convective assembly technique. The cubelike shapes affect the crystalline orientation of individual particles within the self-assembled superlattices compared with the nanoparticles with an isotropic spherical shape. The nanocubes with a size less than 25 nm show a typical superparamagnetic behavior at room temperature. Comparison of the hysteresis loop at 5 K of cubes with different sizes reveals a size-dependent behavior of saturation magnetization and coercivity.

Controlled synthesis and shape-dependent electromagnetic wave absorption characteristics of porous Fe3O4 sub-micro particles

“…On the basis of the factors above, the Fe 3 O 4 particles exhibit high dielectric loss. [33,35,48]. For example, Olmedo et al [48] investigated the complex permittivity and complex permeability of ferromagnetic particles by the extending Bruggeman method, and found that nonspherical particles showed higher ″ and ″ compared with spherical magnetic particles.…”

“…In addition, nonspherical Fe 3 O 4 has larger anisotropic energy compared with the spherical case [35]. The larger anisotropic energy can allow the magnetic resonance to shift to the high frequency region, and thereby improve the magnetic loss [6,10,11].…”

“…Spherical Fe 3 O 4 nanoparticles with size varying from 3 to 20 nm have been synthesized by combing organic-phase reaction with seed-mediated growth [31]. Fe 3 O 4 nanocubes with a different size have also been fabricated by different methods [32][33][34][35]. Recently, Pengand et al [36,37] have developed an oxidation route to fabricate hollow Fe 3 O 4 nanoparticles.…”

Controlled Synthesis and Characterization of Monodisperse Fe3O4 Nanoparticles

“…FeCo alloy nanoparticles 27 and FePt alloy 28 were also produced through a similar synthetic procedure. Recently, Yang et al 29 used the similar method to synthesize monodisperse Fe 3 O 4 nanocubes. Hyeon's group employed the thermal decomposition of metal-surfactant complexes to synthesize monodisperse metal, 30,31 metal oxides, [32][33][34] and ferrite nanoparticles.…”

Structure and Magnetic Properties of Iron/Iron-Oxide Nanoparticles Prepared by Precipitation from Solid State Solution

“…The shape of the NPs depends on the preparation methods. Several studies have demonstrated the controllable synthesis of nonspherical iron oxide NPs with cubic [5,6], hexagonal [7], and rod [8][9][10] morphologies. It was shown that the size of spherical Fe 3 O 4 NPs prepared by hydrolysis can be in the range from 10 to 40 nm in mean diameter.…”