Improvement of Cochineal Extract (Dactylopius coccus Costa) Properties Based on the Green Synthesis of Silver Nanoparticles for Application in Organic Devices

Figure 3

(a) Comparison of UV-Vis spectra of cochineal pigment (pH 12.0), silver nitrate, and AgNPs synthesized from (b) 0.1 ml and (c) 0.4 ml of the cochineal extract. The inset in (a) shows the corresponding CIE chromaticity diagram: cochineal pigment (pH 12.0, x = 0.251, y = 0.406), AgNPs (0.1 ml of the cochineal extract, x = 0.255, y = 0.238), and AgNPs (0.4 ml of the cochineal extract, x = 0.275, y = 0.315). Linear least-squares models (dashed red lines) of UV-Vis spectra (solid blue lines) with Gaussian components are shown in (b) AgNPs (0.1 ml of the cochineal extract) and (c) AgNPs (0.4 ml of the cochineal extract).

(a)

(b)

(c)