Nanoparticle Diameter: 45 nm Volume (@ 50 OD): 0.4 mL Citrate coated gold nanoparticles. As-synthesized nanoparticles stabilized with citrate surfactant Ready for functionalization with thiol containing molecules Core diameter: 4 nm – 200 nm Polydispersity Index (PDI): < 0.1 Absorbance peak: 520 – 850 nm Shelf life: > 1 year (4°C storage) Supplied as liquid suspension in water with 0.01% (w/v) Tween-20