Fig. 6From: Biogenic fabrication and characterization of silver nanoparticles using aqueous-ethanolic extract of lichen (Usnea longissima) and their antimicrobial activitySEM images of silver nanoparticles; (a) under 10,000 magnification, (b) under 1500 magnification, (c) under 20,000 magnification and (d) under 7000 magnification.Back to article page