Green synthesis, characterization and antibacterial activity of silver nanoparticles from root extract of Lepidium draba weed

Figures & data

Figure 1. The XRD profile of bio-synthesized Ag NPs at different values of L. draba root extract: (a) 2.0 mL, (b) 2.5 mL, (c) 3.0 mL and (d) 4.0 mL.

Figure 2. The FT-IR spectra of different values of L. draba root extract in the presence of Ag solution for Ag NPs making: (a) 2.0 mL, (b) 2.5 mL, (c) 3.0 mL and (d) 4.0 mL.

Figure 3. The FE-SEM patterns of bio-synthesized Ag NPs at different values of L. draba root extract: (a) 2.0 mL, (b) 2.5 mL, (c) 3.0 mL and (d) 4.0 mL. The inserted figures are related to TEM images.

Figure 4. The histogram of bio-synthesized Ag NPs size by using of different values of L. draba root extract.

Figure 5. The antibacterial activity of Ag NPs against microorganisms: (1) Ag NPs, (2) distilled water and (3) AgNO3.

Table 1. The zone of inhibition (mm) of Ag NPs, AgNO₃ and distilled water against tested bacteria.

Compound	Zone inhibition
	S. typhimurium	E. coli	B. cereus	S. aureus
Distilled water	6.4	6.4	6.4	6.4
AgNO3	9.9	9.2	9.6	9.9
Ag NPs	10.4	10.8	10.8	10.8