# Structure Property–Application Relationships of Spinel Ferrite Nanoparticles: From Synthesis to Functional Systems

## TL;DR

This review explores how spinel ferrite nanoparticles are made, their properties, and their potential uses in various fields like electronics and medicine.

## Contribution

The paper systematically reviews synthesis methods, structural properties, and applications of spinel ferrite nanoparticles.

## Key findings

- Multiple synthesis methods affect the crystal structure and properties of spinel ferrite nanoparticles.
- Characterization techniques like XRD and SEM are essential for analyzing these nanoparticles.
- Spinel ferrite nanoparticles show promise in electronics, water treatment, and biomedical applications.

## Abstract

This review article provides a systematic analysis of synthesis methods, structural characteristics, and functional properties of spinel-structured ferrite nanoparticles (MFe2O4). The physicochemical principles, advantages, and limitations of various synthesis techniques—including co-precipitation, combustion, sol–gel, thermal decomposition, hydrothermal, solvothermal, microwave-assisted, sonochemical, electrochemical, and solid-state reaction methods—are comparatively discussed. The influence of synthesis parameters on crystal structure, morphology, and cation distribution between tetrahedral and octahedral sites, as well as on magnetic, dielectric, and optical properties, is critically analyzed. Furthermore, the capabilities of characterization techniques such as X-ray diffraction (XRD), scanning electron microscopy with energy-dispersive spectroscopy (SEM/EDS), Fourier-transform infrared spectroscopy (FTIR), FT-Raman spectroscopy, dielectric measurements, and magnetic measurements for investigating spinel ferrites are comprehensively summarized. Finally, the high potential of spinel ferrite nanoparticles for applications in electronics, microwave devices, water treatment, catalysis, sensors, and biomedical fields is highlighted.