Effects of Synthesis Conditions on Magnetic Field Sensitive Colloidal Nanoparticle Properties

Abstract

The first step for new developments in nanotechnology, which includes the design, fabrication and functional use of nanostructured materials and devices, is the synthesis of nanoparticles. The size of nanoparticles in magnetic fluids can be controlled by various synthesis methods. In addition to particle size, the use of surfactants can also add new features to the system. Particles that are generally well soluble in water are easy to use for some applications. Magnetic fluids, in other words ferrofluids, are colloidal suspensions of magnetic nanoparticles. Magnetic fluids are a hybrid structure with fluidity of fluid and magnetism of solid magnetic materials. These structures, which react to the magnetic field, can be used in magneto-optical and magneto-caloric studies. In this study, "high temperature hydrolysis reaction" method was used to synthesize magnetic field sensitive colloidal nanoparticles. In order to observe the effects of the change in reaction conditions on the synthesis, the main synthesis conditions to be compared later were determined. Modified syntheses were formed by changing one of the main synthesis reaction conditions and keeping the others constant, and the effects of the changed condition on the synthesis were observed. In the study, the effects of NaOH/DEG ratio, PAA amount, FeCl3 amount and reaction temperature criteria on the synthesized particle were investigated. Thus, an idea has been gained about how these properties should be adapted to synthesize particles with the desired properties.