Applications superparamagnetic properties

One of the issues in the practical application of nanostructured materials is the ability to synthesize sufficient quantities with appropriate and controllable properties at low cost. Gas phase combustion processes provide one of the best methods for the bulk production of nanostructured materials due to the relative ease of scale-up and the relative simplicity of the process. The magnetic system chosen for study was y-Fc203/Si02 because a composite of this class has been demonstrated to yield superparamagnetic properties (3) via a liquid phase synthesis route. 

In this paper we have demonstrated the application of gas-phase combustion processes to produce nanocomposites with superparamagnetic properties. The combustion process was designed in such a way as to allow for the rapid formation of nano-liquid droplets which would phase segregate, combined with rapid quenching to preserve the microstructure and chemical composition. The resulting material showed superparamagnetic behavior between 155 K and room temperature. 

Functional silica nanoparticles (Nps) with in particular NIR luminescent and superparamagnetic properties constitute very promising candidates for many applications in the field of theranostics and photonics. In the literature numerous reports can be found to develop such NPs like surface modification, or by the coencapsulation of magnetic nanoparticles and phosphors in silica shell or in polymeric matrix, or via a micellization procedure [1-7]. 

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