Used in biomedical applications such as targeted drug delivery, where the silica coating allows for surface functionalization with drugs or targeting ligands while preventing aggregation of magnetic cores. Enables efficient magnetic separation in diagnostic assays and cell sorting due to stable dispersion and easy manipulation under external magnetic fields. Applied in environmental remediation for removal of pollutants from water, where magnetic silica particles bind contaminants and are then retrieved magnetically. Also utilized in catalysis as recoverable support materials for catalysts, allowing repeated use without significant loss of activity. Suitable for imaging and theranostic platforms by combining magnetic resonance contrast properties with optical or radioactive labels within the silica matrix.