Nanoparticle Diameter: 100 nm Fluorescence Label: None Volume (@ 10 OD): 0.4 mL Gold nanoparticles functionalized with Streptavidin. Can be directly conjugated to biotin-AF4unctionalized molecules or substrate Can be labeled with an optional fluorescent dye tag Core diameter: 4 nm – 200 nm Absorbance peak: 520 – 850 nm 5 kDa PEG spacer, 2 kDa PEG backfill Shelf life: > 4 months (4°C storage) Supplied as liquid suspension in PBS