Nanoparticle Diameter: 150 nm PEG: 2 kDa PEG Volume (@ 50 OD): 0.4 mL Gold nanoparticles functionalized with amine-terminated polyethylene glycol (PEG). Can be covalently conjugated to carboxyl-terminated molecules Core diameter: 4 nm – 200 nm Absorbance peak: 520 – 850 nm Shelf life: > 1 year (4°C storage) Supplied as liquid suspension in PBS or in water with 0.01% (w/v) Tween-20