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

Table 1

Wavelength analysis of the half width at half maximum (HWHM) of cochineal at pH 12 and biosynthetic AgNPs at different initial volumes (0.1 and 0.4 ml) of the cochineal extract.

Number	Cochineal at pH 12		0.4 ml of the cochineal extract in 10 ml of AgNO3		0.1 ml of the cochineal extract in 10 ml of AgNO3
	Wavelength (nm)	Spectral width (HWHM) (nm)	Wavelength (nm)	Spectral width (HWHM) (nm)	Wavelength (nm)	Spectral width (HWHM) (nm)
1	203.02	8.72	203.02	7.90	203.02	8.70
2	273.58	14.69	279.30	16.70	280.00	22.00
3	303.17	20.56	303.50	12.00	—	—
4	—	—	—	—	379.00	44.5
5	—	—	428.50	66.00	433.00	47.00
6	489.59	22.20	489.00	15.00	—	—
7	525.75	21.63	522.26	21.50	522.26	29.00
8	569.58	27.10	561.00	19.80	564.00	23.00

The wavelengths correspond to the formation of silver nanoparticles and of the natural pigment (cochineal) [21–23].