Metal-coated Particles

Metal-Coated Microspheres

microParticles GmbH offers monodisperse metal-coated microspheres for modern applications in the fields of catalysis, microelectronics, ACAs, SERS, PIV, and bioassays. These composite particles are characterized by a uniform polymer core (e.g., melamine resin, polystyrene, PMMA, or silicon dioxide) with a metal shell of gold, silver, copper, or other metals.

Advantages of Melamine Resin (MF) Particles:

Highly reactive surface with amino/imino groups for metal ion binding
Strong affinity for complex anions (e.g., AuCl₄⁻, PdCl₄²⁻)
Exceptional gold ion adsorption capacity (up to 0.5 g/g for 500 nm particles)

Coating techniques:

Self-organization: Adsorption of preformed metal nanoparticles
In-situ synthesis: Reduction of surface-bound metal ions to uniform nanoparticles (~2–3 nm)
Electroless deposition: Formation of continuous metal nanocoatings with adjustable thickness