Research Article
Plasmonic Sensing of Aqueous-Divalent Metal Ions by Biogenic Gold Nanoparticles
Figure 1
(a) UV-Vis spectra of biogenic AuNPs measured at different times during the reaction of 0.4 mL of Camellia sinensis extract with 5 mL of a 10-3 M of HAuCl4. Curve profiles correspond to 0.5 h (black), 1 h (red), 1.5 h (blue), 2 h (pink), 3 h (green), 4 h (purple), and 24 h (violet). (b) Picture of vials containing AuNPs obtained at different reaction times (0 h to 24 h).
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