Interface Phenomena and Magnetic Hyperthermia of Complex Fe3O4-Au Nanoparticles

• Grant number: 23/14731-9
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: January 01, 2024
• End date: December 31, 2024
• Field of knowledge: Physical Sciences and Mathematics - Physics - Condensed Matter Physics
• Principal Investigator: Diego Muraca
• Grantee: Mirela Barbosa Alves
• Host Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil

Abstract

The aim is to carry out studies on the magnetic hyperthermia effect of core-shell type FeO4-Au complex magnetic nanoparticles. Magnetic hyperthermia consists of converting energy from the magnetic field into heat and the efficiency of this process is given by the Specific Absorption Rate. To achieve this objective, magnetite nanoparticles (Fe3O4) of varying sizes will be synthesized, which will later be used as seeds to synthesize complex MNPs covered with gold (core shell). With these experiments, we intend to find out whether the interface between gold and magnetite can induce new physical phenomena and improve the magnetic properties of the final nanoparticle.Structural characterizations will be carried out using X-ray Diffraction, Transmission Electron Microscopy and Scanning Electron Microscopy measurements. Magnetic characterizations will be carried out through measurements of magnetization (DC) by magnetic field, and magnetization by temperature in the SQUID (Super Quantum Interference Device) and PPMS (Physical Properties Meassurement System), available at the Materials and Low Temperatures Laboratory, IFGW . Calorimetry (magneto-hyperthermia) studies will be carried out at different fields and frequencies with equipment from the Fundamental and Applied Magnetism Group, at IFGW.The candidate has been working on the study of the fundamentals of nanomagnetism and has already carried out the synthesis of a sample of magnetite, with the preliminary results relevant to the projects presented in section 6