Nanocs provides a number of different sized magnetic particles coated with a thin layer of gold on their surface. Thickness of this gold layer ranges from 20-100 nm. These gold coated magnetic particles have high affinity toward proteins, antibodies, peptides and nucleic acids. We also offer surface functionalized gold magnetic particles that can be used bioconjugation. With their high affinity and reactivity to biomolecules, our gold coated magnetic particles can be used for fast and easy targeting, capturing of cellular and molecular targets.