Used in biomedical applications such as targeted drug delivery, where the silica coating allows for easy functionalization with drugs or biomolecules while preventing aggregation and enhancing biocompatibility. Employed in magnetic separation techniques to isolate DNA, proteins, or cells from complex mixtures due to their stable dispersion and responsive magnetic properties. Applied in diagnostic imaging as contrast agents in MRI, benefiting from the combined magnetic core and protective SiO2 shell. Also utilized in catalysis, where the particles serve as magnetically recoverable catalyst supports, enabling easy separation and reuse in chemical reactions.