HIGHLIGHTS
SUMMARY
The presence of functional_groups on its surface, such as amine, imine, or catechol makes it possible to establish bonds with other molecules or biomolecules, or to chelate or coordinate metal ions for the formation of metal nanoparticles, e_g, gold nanoparticles (AuNPs), on their surface. As a study demonstrated, AuNPs are known to form on the surface of PDA nanospheres and microspheres by the coordination of chloroauric ions with the surficial functional_groups of PDA and reduction by PDA catechol groups, or by adding a reductor, such as ascorbic acid. When a high concentration of Au . . .
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