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. 2020 Sep 20;10(9):1885. doi: 10.3390/nano10091885

Figure 2.

Figure 2

UV–vis spectra of Ag, Au, and Au–Ag bimetallic NPs with different concentrations of plant extract, i.e., (i) LC = low concentration of PE, (ii) HC = high concentration of PE. (a) UV–vis spectra of PE, Au, Ag, and Au–Ag phase segregated bimetallic NPs prepared with low concentration (LC) of plant extract (PE). (b) Zoom-in version of the surface plasmon bands related to the spectra shown in (a). (c) UV–vis spectra of PE, Au, Ag, and Au–Ag alloy bimetallic NPs prepared with high concentration (HC) of plant extract (PE). (d) Zoom-in version of the surface plasmon bands related to the spectra presented in (c).