Chemical Vapor Growth of One‐dimensional Magnetite Nanostructures

Mathur, Sanjay; Barth, Sven; Werner, Ulf; Hernández-Ramírez, Francisco; Romano‐Rodríguez, A.

doi:10.1002/adma.200701448

Cited by 94 publications

(64 citation statements)

References 44 publications

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“…Moreover, the high-resolution transmission electron microscopy (HRTEM) image of the boxed area in Figure 3a further supported the single-crystalline nature of these magnetite nanorods (Fig.3b). The lattice fringes (~0.29nm) observed in this image agree well with the separation between the (220) lattice planes which indicate that the as-prepared magnetite nanorods grow along [110] direction which is in good agreement with the reported literature [17,19]. …”

Section: Morphology and Structuresupporting

confidence: 90%

“…A most synthetic method for magnetite NPs is usually carried out by the aqueous coprecipitation of Fe 2+ and Fe 3+ [12]. However, magnetic-field induction [13][14][15], chemical vapor deposition [16][17][18][19] and hard templated synthetic methods [20][21][22] have also been developed to fabricate 1D magnetites. The above methods for 1D magnetite usually need some special equipments such as high temperature furnaces and magnetic devices which cause a complex and tedious synthesis process.…”

Section: Introductionmentioning

confidence: 99%

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A Low-Cost and High-Yield Production of Magnetite Nanorods With High Saturation Magnetization

Cui

et al. 2015

J. Chil. Chem. Soc.

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Nanopowders of single-crystalline rod-like magnetite have been synthesized in a glycerol-water system under hydrothermal condition by using the goethite (α-FeOOH) precursor. The influence of different reaction parameters on the morphology and composition of the products have been investigated. The structure, morphology and magnetic properties of the products were characterized by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), transmission electron microscope (TEM) and superconducting quantum interference device (SQUID). The results show that every as-prepared Fe 3 O 4 nanorod with diameter ca.70nm grows along the [110] direction which is one of easy magnetic axes of magnetite. The ratio of glycerol to water has a great effect on the purity at given temperature. Magnetic measurements indicated that the specific saturation magnetization (M s ) and coercivity values (H c ) of magnetite nanorods were 90 emu/g and 172Oe, respectively. An in situ dissolution-reduction-reassembling formation mechanism is recommended for as-synthesized magnetite nanorods.

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Section: Morphology and Structuresupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

A Low-Cost and High-Yield Production of Magnetite Nanorods With High Saturation Magnetization

Cui

et al. 2015

J. Chil. Chem. Soc.

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“…observed lattice spacing of 0.298 nm, which match well with the (220) lattice planes and confirmed that the nanorods grew along (110) direction [50,42]. Fig.…”

Section: Wang Et Al Observed a Lattice Spacing Of 048 Nm For Fe3o4 supporting

confidence: 76%

Synthesis of stable iron oxide nanoparticle dispersions in high ionic media

Nourafkan

Asachi

Gao

et al. 2017

Journal of Industrial and Engineering Chemistry

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Graphical abstract2 ABSTRACT A novel one-pot method was developed in this work to synthesize and disperse nanoparticles in a binary base fluid. As an example, stable magnetite iron oxide (Fe3O4) dispersions, i.e., nanofluids, were produced in a high ionic media of binary lithium bromide-water using a microemulsion-mediated method. The effects of temperature and precursor concentration on morphology and size distribution of produced nanoparticles were evaluated. An effective steric repulsion force was provided by the surface functionalization of nanoparticles during the phase transfer, supported by the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory. The formed nanoparticles exhibited a superior stability against agglomeration in the presence of high concentrations of lithium bromide, i.e., from 20 to 50 wt.%, which make them good candidates for a range of novel applications.

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“…[24][25][26] Fe 3 O 4 nanowires were grown in a cold-wall low pressure chemical vapor deposition (CVD) reactor on an alumina substrate. 27 A high-resolution TEM image of a representative magnetite nanowire is shown in Fig. 1(a) illustrating the excellent crystal quality, which is also supported by the sharp fast Fourier transformation (FFT) image.…”

mentioning

confidence: 66%