Synthesis of silver nanoparticles using reducing agents obtained from natural sources (Rumex hymenosepalus extracts)

Abstract

We have synthesized silver nanoparticles from silver nitrate solutions using extracts of Rumex hymenosepalus, a plant widely found in a large region in North America, as reducing agent. This plant is known to be rich in antioxidant molecules which we use as reducing agents. Silver nanoparticles grow in a single-step method, at room temperature, and with no addition of external energy. The nanoparticles have been characterized by ultraviolet-visible spectroscopy and transmission electron microscopy, as a function of the ratio of silver ions to reducing agent molecules. The nanoparticle diameters are in the range of 2 to 40 nm. High-resolution transmission electron microscopy and fast Fourier transform analysis show that two kinds of crystal structures are obtained: face-centered cubic and hexagonal.

Biocidal Properties of Silver-Nanoparticles in Water Environments

“…This effect was confirmed in various synthesis of silver nanoparticles from different donors [24,25]. The intensity of solution staining increased with the concentration of Ag and continued until the fifth day of the experiment.…”

Microwave-assisted green synthesis and antimicrobial activity of silver nanoparticles derived from a supercritical carbon dioxide extract of the fresh aerial parts of <i>Phyllanthus niruri</i> L

“…The silver ions liberated from the AgNPs of the extract play vital role in the bactericidal effect of the bacteria. The silver ions which are released from the AgNPs are believed to interact with the negatively charged bacterial cell, leading to rupture of the bacterial cell which ultimately cause a denaturation of protein and eventually cell death [22]. AgNPs is also known for destabilization of the outer membrane of the microbial cell causing damage to the plasma membrane, which leads to the diminution of intracellular ATP [23].…”

Plant-mediated synthesis of silver nanoparticles using parsley (Petroselinum crispum) leaf extract: spectral analysis of the particles and antibacterial study

“…The high content of ascorbic acid in parsley leaves can play vital role as it acts as a strong reducing agent in this reaction. It reduced the silver cations present in the silver nitrate solution during interaction (Rodríguez-León et al 2013) and caused the formation of Ag nanoparticles at room temperature. Later, antibacterial efficacy of these biosynthesized Agnanoparticles was tested against three bacteria-Klebsiella pneumoniae, Escherichia coli and Staphylococcus aureus.…”