The goad of the thesis is to build the manufacture process of nano-sized magnetic fluids based on iron oxide (uniform particle size and high magnetic saturation) with stable technology; Characteristic research of magnetic properties of magnetic nanoparticles; assessment of toxicity and test of effects on cells, aiming to make contrast medicine in imaging diagnosis by magnetic resonance imaging (MRI), application on accurately identifying cancer. | Summary of chemistry doctoral thesis: Study on the fabrication of magnetic fluids based on superparamagnetic iron oxide nanoparticles (SPIONs) applied to magentic resonance imaging (MRI) application