Preparation Of Zinc-Ferrite Nanoparticles By Thermal Decomposition

Magnetic characteristics are crucial for the successful performances of magnetic nanoparticles in biomedical applications such as magnetic resonance imaging (MRI), drug delivery, cellular signaling, and hyperthermia. With Zn2+ dopants at the Td site of the ferrite inverse spinel structure we can get magnetic nanoparticles that exhibit exhibit much higher magnetization value and provide the better MRI contrast effects. In this paper we use iron acetylacetonate, zinc acetylacetonate as precursor, Oleie acid as the surfactant and benzyl ether as the solvent. We choose an innovative way of the thermal decomposition preparation of zinc-ferrite nanoparticles that we use the "hot-injection" instead of the original "heating-up" methods, thus producing much higher doped zinc-ferrite nanoparticles.The effect of different reactive conditions on the size, morphology, doping and magnetic properties including the SAR, the magnetization and the r2 relaxivity of the zinc-ferrite nanoparticles are studied. We keep the amount of precursor stable and change the amount of Oleic acid, and it shows a nonlinear effect on the size, morphology, doping and magnetic properties of the zinc-ferrite nanoparticles. Then we enlarge the total amount of precursor and surfactant simultaneously to explore the large scale producing of high-performance zinc-ferrite nanoparticlesThen we work on the preparation of Cu(dieten)2(C104)2, which changes its color from red to purple at 317K. We use this Cu(dieten)2(C104)2 on a piece of Gellan gel to simulate the thermal monitor on hyperthermia.