Research Article
Plasmonic Sensing of Aqueous-Divalent Metal Ions by Biogenic Gold Nanoparticles
Figure 3
(a) FTIR spectrum of AuNPs obtained with 0.4 mL of Camellia sinensis extract and 5 mL of 10-3 M of HAuCl4. (b) FTIR spectrum of Camellia sinensis extract.