DiagPoly™ Europium Carboxylate Polystyrene Nanoparticles, 200 nm (#DEC-T006) are polystyrene or polystyrene with coploymer grafted surface. The particles are chelated with Eu (excitation: 333 nm, emission: 613 nm, red fluorescence) for extremely broad stokes shift which can prevent non-specific fluorescence interference. 200 nm europium polystyrene nanoparticles are functionalized with carboxyl groups (COOH) and applied in lateral flow, diagnostic assay, molecular biology and other time-resolved fluorescent research. The density of particle solution is 1.06 g/cm3. Each carboxylate group will provide parking area of 20 A2 on the surface. https://www.cd-bioparticles.com/product/diagpoly-europium-carboxylate-polystyrene-nanoparticles-200-item-dec-t006-979.html