Biosynthesis of Silver Nanoparticles from Desmodium triflorum: A Novel Approach Towards Weed Utilization. (11th October 2010)

• Record Type: Journal Article
• Authors: Ahmad, Naheed; Sharma, Seema; Singh, V. N.; Shamsi, S. F.; Fatma, Anjum; Mehta, B. R.
• Other Names: Monteiro Gabriel A. Academic Editor.
• Is Part Of: Biotechnology research international. Volume 2011(2011)
• Publication Date: 2010-10-11
• Subjects: Biotechnology -- Periodicals; Biotechnology; Biotechnology; Periodicals; 660.6
• DOI: 10.4061/2011/454090
• Languages: English
• ISSNs: 2090-3138

Abstract

Abstract : A single-step environmental friendly approach is employed to synthesize silver nanoparticles. The biomolecules found in plants induce the reduction of Ag + ions from silver nitrate to silver nanoparticles (AgNPs). UV-visible spectrum of the aqueous medium containing silver ions demonstrated a peak at 425 nm corresponding to the plasmon absorbance of silver nanoparticles. Transmission electron microscopy (TEM) showed the formation of well-dispersed silver nanoparticles in the range of 5–20 nm. X-ray diffraction (XRD) spectrum of the AgNPs exhibited 2 θ values corresponding to the silver nanocrystal. The process of reduction is extracellular and fast which may lead to the development of easy biosynthesis of silver nanoparticles. Plants during glycolysis produce a large amount of H + ions along with NAD which acts as a strong redoxing agent; this seems to be responsible for the formation of AgNPs. Water-soluble antioxidative agents like ascorbic acids further seem to be responsible for the reduction of AgNPs. These AgNPs produced show good antimicrobial activity against common pathogens.