Fig. 2From: Multifunctional Gold Nanoparticles for Improved Diagnostic and Therapeutic Applications: A ReviewSynthesis and functionalization of AuNPs. Biomolecules with functional groups are first adsorbed on the NP surface through gold-thiol affinity. Then, other functional groups such as amine group can be used to bind molecules with a carboxyl groups to attach targeting or drug moieties. Adapted from [32]Back to article page