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Gold nanoparticles (AuNPs) have a rich history in chemistry, dating back to ancient R beg glasses f an ov or decor er 150 y ati ears ago ve purpose oman times w s. The modern here the er yw a of A ere used uNP synthesis to stain pr was operties possibl that y the diff first er fr to om bulk observ with the w e that or colloidal k of Michael gold solutions Faraday, ha who gold [1, 2]. R ve spherical and nonspherical shapes, ha yielding methods for the synthesis of A last as size-and shape-dependent optical uNP v uNPs, including eliable those with and highe been de such half-century [3]. The resulting A s ha a ov and electr ve unique pr veloped over the high surface area t olume ratio, and surfaces that can onic operties, be r featur eadil es, modified with ligands containing functional groups such as y