Research Article
Plasmonic Sensing of Aqueous-Divalent Metal Ions by Biogenic Gold Nanoparticles
Figure 8
FESEM micrographs, electron dispersive X-ray spectra, and chemical mapping of the Au/biocomposite after the contact with metal ions: Zn2+ (a, b), Hg2+ (c, d), Sr2+ (e, f), Cu2+ (g, h), Mg2+ (i, j), Pb2+ (k, l), and Ca2+ (m, n), respectively. (o) Picture of the cellulosic material coated with Au nanoparticles after interaction with the different metal ion solutions.