Fig. 4:
Schematic representation of (a) Au NP formation with distinct shapes (cauliflower, raspberry, urchin, and confeito, respectively) via sonication, employing GA as a capping agent and catechol and ascorbic acid (reductants). Reproduced with the permission of ref (Wang et al., 2012), Copyright © 2012, The Royal Society of Chemistry and (b) striking color variation of the PEDOT-Au NPs prepared using GA as a stabilizer. Reprinted with the permission of ref (Rocha et al., 2014), Copyright © 2014, American Chemical Society.