Novel ferroferric oxide/polystyrene/silver core-shell magnetic nanocomposite microspheres as regenerable substrates for surface-enhanced Raman scattering

- The ferroferric oxide/polystyrene/silver particles with a well-defined core-shell structure have been synthesized.
- The composite particles provide excellent SERS performance and have a detecting limit of 10−10 M R6G.
- The composite particles show superior stability and reproducibility for SERS application.