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Hydrophobic SPM Fe3O4 NPs having mean particle size as large as 20 nm

In summary, colloidal Fe3O4 NPs have been successfully prepared in large quantities using novel or improved methods based on controlled coprecipitation and hydrothermal synthesis. Physical property measurements reveal that our strategy for increasing the size of the particles toward 20 nm through synthesis under elevated temperatures has worked effectively, offering functional SPM Fe3O4 NPs with the desired exceptionally high Ms. In this paper, we outline new and improved large-scale routes to h ....

Beckman Coulter ,

The structure and phase composition of colloidal SPM Fe3O4 NPs

The structure and phase composition of colloidal SPM Fe3O4 NPs remains puzzling despite the availability of increasing amounts of structural information. Various spectroscopic measurements have shown that the structure of SPM Fe3O4 NPs can be described as a magnetite core with a thin overoxidized (Fe3+) surface shell, which is compositionally close to a maghemite polymorph (γ-Fe2O3).9a, Conversely, the putative Fe3O4@γ-Fe2O3 core−shell structure has not been observed by X-ray diffraction or elec ....

Synthesis of Fe3O4 powder by a novel arc discharge method

Magnetite Fe3O4 ultrafine powder, a magnetic material, was synthesized by a novel arc discharge method of metallic iron filaments in NaCl electrolyte. The size and shape of the products were influenced by the voltage between the two metallic iron filaments. Ultrafine iron oxides are important materials for magnetic and pigment applications. As a conventional magnetic material, nanocrystalline Fe3O4 powders with a spinel structure have potential applications for ferrofluid, magnetic refrigeration ....

Fe3O4 Powder is one of the multi-functional magnetic materials

Which has extensive application in such aspects as a magnetic recording material, ferrofluid, catalysis, medicine and pigment, etc. Stanford Advanced Materials (SAM) has rich experience in manufacturing and supplying high-quality Spherical Iron Oxide (Fe3O4) Powder. Iron(II,III) oxide is chemical compound with formula Fe3O4. It occurs in nature with the mineral magnetite. It exhibits permanent magnetism and is ferrimagnetic, but is sometimes incorrectly described as ferromagnetic. The oxidized m ....

Advanced Materials , Spherical Iron Oxide ,