Used in biomedical applications such as targeted drug delivery, where the silica coating enables easy functionalization with drugs or biomolecules while protecting the magnetic core. The particles can be guided to specific sites in the body using external magnetic fields, improving treatment precision. Also employed in magnetic separation of cells, DNA, or proteins due to their stable dispersion and high surface area. Common in diagnostic assays and biosensors for rapid detection of pathogens. Applied in environmental remediation to remove pollutants from water, where magnetic retrieval allows reuse. Suitable for catalysis support, where the silica shell stabilizes catalysts and enables magnetic recovery after reaction.