URL https://www.researchgate.net/profile/Raditya-Iswandana/publication/340113915/figure/fig1/AS:872436014780417@1585016363731/Ultraviolet-visible-absorption-spectrum-52850-nm-of-gold-nanoparticle_Q640.jpg
URL2https://www.researchgate.net/figure/Ultraviolet-visible-absorption-spectrum-52850-nm-of-gold-nanoparticle_fig1_340113915