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This article presents a literature review of the iron oxide nanoparticles synthesis routes with applications as nanocatalysts in the synthesis of carbon nanostructures using the plastic pyrolysis method. Through pyrolysis, it is possible to synthesize structures such as single-walled carbon nanotubes (SWCNTs), double-walled carbon nanotubes (DWCNTs), multi-walled carbon nanotubes (MWCNTs), and carbon nanofibers (CNFs). The morphological and chemical properties of the nanocatalysts ensure the majority production with minimal defects of these nanostructures. Regarding the iron oxide nanocatalyst, this review emphasizes the importance of parameters such as its shape and size, properties that are controlled during the synthesis process, and the significance of the interaction between nanoparticles and the support material used. These factors directly influence the nanocatalyst's performance in terms of catalytic activity, selectivity, and durability. [ABSTRACT FROM AUTHOR]

Magnetic iron oxide nanoparticles (NPs) have been widely used as contrast agents in magnetic resonance imaging. In recent years, interest has been focused on obtaining and functionalizing them to make them better vectors and more soluble or specific to a given target. In the present work, we report the synthesis and characterization of NPs functionalized with two naphthalene derivatives (Amylovis®), which exhibit high affinity for ß-amyloid plaques characteristic of Alzheimer's disease (AD). These ones were characterized by FT-IR, TGA, DLS and SEM. The obtained NPs were conjugated by Steglich's method to two different Amylovis® molecules, determined this by ligand differences on the surface of the synthesized NPs. Amylovis® functionalized NPs could be useful for the detection of amyloid plaques that would contribute to an early diagnosis of AD. [ABSTRACT FROM AUTHOR]

Hyperthermia therapy is the method of treating cancer by application of heat, increasing the temperature of the cells between 40° to 43°C, destroying the cells with cancer. The problem of this technique is the generation and control of the heat inside tumor cells without harming the nearby healthy tissue. The cancer cells have typical diameters of 10 to 100 microns and absorb magnetic particles. In the present study, the method of heating magnetite nanoparticles by microwaves was used. This method provides a quick bulk heating to an absorbing medium. Applying the Holzwarth et al. (1998) energy balance approach, a nonlinear regression of the data was used to obtain heat loss rates and energy absorption. Finally we compare the results with those of Kim et al. (2005). [ABSTRACT FROM AUTHOR]