Synthesis of magnetic nanoparticles in bicontinuous microemulsions. Effect of surfactant concentration
Source abstract
Abstract
Precipitation was accomplished at 80 °C for magnetic nanoparticles in bicontinuous microemulsions that were stabilized with different concentrations of a surfactants mixture of dodecyltrimethylammonium bromide/didodecyldimethylammonium bromide (3/2, w/w). These nanoparticles were characterized by X-ray Diffraction, Scanning Transmission Electronic Microscopy (STEM), and Vibrating Sample Magnetometry (VSM), which demonstrated that they were composed of magnetite or a mixture of magnetite-maghemite. The particles were found to have average diameters between 6.9 and 7.9 nm with relatively narrow particle size distribution and showed possible superparamagnetic behavior. In addition, we observed an inverse dependence of particle size on surfactant concentration. Yields obtained in these precipitation reactions were found to be up to three times higher than those typically reported in specialized literature about precipitation of magnetic nanoparticles in reverse microemulsions.
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Research context
OpenAlex topics: Magnetic Properties and Synthesis of Ferrites · Iron oxide chemistry and applications · Characterization and Applications of Magnetic Nanoparticles
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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