DiagNano™ NeutrAvidin Conjugated Gold Nanopartcles, 15 nm, In-vivo (# GCNV-15) are spherical gold nanoparticles conjugated with NeutrAvidin. These gold nanoparticles can be used especially in-vivo since they are coated in a proprietary dense layer of hydrophilic polymers that shield the gold surface and give the particles ultra-long circulation times. 50 OD nanoparticles are supplied in DI water or other buffers.