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Search for "iron oxides" in Full Text gives 36 result(s) in Beilstein Journal of Nanotechnology.
Thermal treatment of magnetite nanoparticles
Beilstein J. Nanotechnol. 2015, 6, 1385–1396, doi:10.3762/bjnano.6.143
- simple synthetic procedure [7]. All of the above-mentioned advantages promote the popularity of ferrite nanoparticles. Additionally, there is the possibility to fabricate many different forms of iron oxides. During each step of the synthesis process, a structure transformation can be expected, resulting
- nanoparticles oxidize to a mixture of iron oxides (γ-Fe2O3 and α-Fe2O3) even at 200 °C [19]. However, this temperature can vary due to the high surface area and various activity of the nanoparticles, which results in a more exothermic heat process during oxidation at low temperature. In general, it can be
Influence of the shape and surface oxidation in the magnetization reversal of thin iron nanowires grown by focused electron beam induced deposition
Beilstein J. Nanotechnol. 2015, 6, 1319–1331, doi:10.3762/bjnano.6.136
- , for example, a systematic characterization of the iron oxides formed at the surface, the continuity of the magnetic layer at such low thicknesses, and the nanowire roughness. Conclusion A systematic magneto-optical Kerr effect study of the coercive field as a function of thickness and width in Fe
Silica micro/nanospheres for theranostics: from bimodal MRI and fluorescent imaging probes to cancer therapy
Beilstein J. Nanotechnol. 2015, 6, 546–558, doi:10.3762/bjnano.6.57
Multifunctional layered magnetic composites
Beilstein J. Nanotechnol. 2015, 6, 134–148, doi:10.3762/bjnano.6.13
- areas in between the layers show the presence of polycrystalline nanoparticles with no preferred orientation (see Figure S5, Supporting Information File 1). The iron oxides magnetite and maghemite show very similar diffraction patterns and d-spacings, therefore it is not possible to differentiate these
Cathode lens spectromicroscopy: methodology and applications
Beilstein J. Nanotechnol. 2014, 5, 1873–1886, doi:10.3762/bjnano.5.198
- map in Figure 10b (right panel). This is a surprising confirmation of the magnetocrystalline anisotropy strength dominating the shape anisotropy. Iron oxides find wide application in several fields of research, among others magnetism and heterogeneous catalysis. In both cases, the heteroepitaxial
Influence of surface-modified maghemite nanoparticles on in vitro survival of human stem cells
Beilstein J. Nanotechnol. 2014, 5, 1732–1737, doi:10.3762/bjnano.5.183
- for the above mentioned purposes [9]. Monosized iron oxide nanoparticles, sometimes called ultra-small superparamagnetic iron oxide nanoparticles, play the dominant role. Quantum dots, gold and, recently, also upconversion nanoparticles are used less frequently. The main advantages of iron oxides
- (magnetite Fe3O4 or maghemite γ-Fe2O3) are their simple preparation and their magnetic properties, which are necessary for detection. Moreover, it is convenient that iron oxides are readily metabolized in the body. From this point of view, quantum dots are disqualified due to their toxicity. Like in every
Manipulation of isolated brain nerve terminals by an external magnetic field using D-mannose-coated γ-Fe2O3 nano-sized particles and assessment of their effects on glutamate transport
Beilstein J. Nanotechnol. 2014, 5, 778–788, doi:10.3762/bjnano.5.90
- dextran [5][6]. Recently, immortalized cells of the MHP36 hippocampal cell line labeled with gadolinium rhodamine dextran in vitro were tracked in ischemia-damaged rat hippocampus in perfused brains ex vivo [7]. Contrast agents based on dextran-coated iron oxides are commercially available as blood pool
Carbon dioxide hydrogenation to aromatic hydrocarbons by using an iron/iron oxide nanocatalyst
Beilstein J. Nanotechnol. 2014, 5, 760–769, doi:10.3762/bjnano.5.88
- CO2 hydrogenation reactions. Earlier research showed that bulk iron and iron oxides catalyze CO2 hydrogenation, producing mainly methane. These catalysts were rapidly deactivated due to carbon deposition [11][12]. Doping with promoters such as potassium [13][14][15][16][17][18], manganese [19][20][21
En route to controlled catalytic CVD synthesis of densely packed and vertically aligned nitrogen-doped carbon nanotube arrays
Beilstein J. Nanotechnol. 2014, 5, 219–233, doi:10.3762/bjnano.5.24
- phases accompanying the nanotubes. The most intensive reflections at 2θ = 42.9, 44.7 and 49.9° could be assigned to α-Fe (110) and γ-Fe (111, 200), respectively. The peak at 2θ = 35°, of the second highest intensity, matches several iron oxides, i.e., FeO, Fe2O3 and Fe3O4. The iron oxides in all of their
Synthesis of boron nitride nanotubes from unprocessed colemanite
Beilstein J. Nanotechnol. 2013, 4, 843–851, doi:10.3762/bjnano.4.95
- difference, they do not effectively interact with NH3 gas. Therefore, no BNNT formation was observed. However, when iron oxides were used as catalysts, the formation of BNNTs was dramatically improved. The BNNTs synthesized with the use of Fe3O4 (Figure 1c) or Fe2O3 (Figure 1d) are clearly seen in the
Magnetic nanoparticles for biomedical NMR-based diagnostics
Beilstein J. Nanotechnol. 2010, 1, 142–154, doi:10.3762/bjnano.1.17
- The synthesis of elemental iron-based nanoparticles (i.e., with elemental iron rather than iron oxides) and their stable dispersion in aqueous media, has remained one of the most attractive goals in magnetic nanomaterial engineering. Elemental iron (Fe) has a higher magnetization than that of metal
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