20nm Biotin Silver NanoparticlesSilver nanoparticle core size: 20nm (+ 3nm) Size dispersity: CV <18% Surface composition: Biotin PEG5000 SH methoxy PEG SH Biotin surface density: 0. 5 nm2 Absorption max: 398 410nm Concentration: 1 mg ml Optical Density (OD): 125 Particles per ml: ~2. 3E+13 Formulation: Supplied in USP grade purified water Properties The precisely engineered silver nanoparticle surface with extended biotin groups maximizes streptavidin binding by minimizing steric