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Gold nanoparticles’ (AuNPs) functionalization for theranostics. After functionalization with polyethylene glycol (PEG) for higher biocompatibility, AuNPs may be functionalized with a variety of molecules, including chemotherapeutical drugs, antibodies, small interference RNA (siRNA), short hairpin RNA (shRNA), fluorescent dyes, proteins, or a combination of several biomolecules.
