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Layer-By-Layer Assembly of Core-Shell Magnetite Nanoparticles: Effect of Silica Coating on Interparticle Interactions and Magnetic Properties
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References
1999
Year
NanoparticlesMagnetic PropertiesEngineeringPolymer-based MagnetChemistryMagnetoelastic MaterialsMagnetic MaterialsFerrofluidMagnetismChemical EngineeringNanoscale ChemistryMagnetic Thin FilmsMaterials ScienceCore-shell Magnetite NanoparticlesLayered Magnetic MaterialsNanotechnologyLayer-by-layer AssemblyMagnetic MaterialCooperative MagnetizationNanomaterialsAdjacent NanoparticlesNatural SciencesSilica CoatingNanocompositeFunctional MaterialsNanomagnetism
Layered magnetic materials have been prepared using layer-by-layer deposition, a technique that allows engineering of the structure of individual particles while remaining simple to carry out. Organic–inorganic sandwich films of superparamagnetic Fe3O4 thus prepared consisted of densely packed assemblies of Fe3O4 nanocrystallites that showed good adhesion to a variety of substrates and excellent mechanical properties. Coating the nanoparticles with a shell of SiO2 was found to greatly reduce the cooperative magnetization switching between adjacent nanoparticles.