Open AccessSynthesis and characterisation of silver nanoparticles using leaf extract of Artemisia afra and their in vitro antimicrobial and antioxidant activities
Author(s) -
Elemike Elias E.,
Onwudiwe Damian C.,
Ekennia Anthony C.,
Jordaan Anine
Publication year - 2018
Publication title -
iet nanobiotechnology
Language(s) - English
Resource type - Journals
ISSN - 1751-875X
DOI - 10.1049/iet-nbt.2017.0297
Subject(s) - silver nanoparticle , surface plasmon resonance , nuclear chemistry , antimicrobial , fourier transform infrared spectroscopy , nanoparticle , antioxidant , aqueous solution , chemistry , transmission electron microscopy , terpenoid , carboxylate , materials science , organic chemistry , nanotechnology , stereochemistry , chemical engineering , engineering
In this study, the conversion of silver ions into ∼30.74 nm sized silver nanoparticles (AgNPs) was achieved in 30 min at a reaction temperature of 80–90°C in aqueous leaf extract of Artemisia afra . The synthesised AgNPs showed surface plasmon resonance in the range of 423–438 nm. Spherical and face‐centred cubic nanoparticles were confirmed by transmission electron microscope (TEM) and X‐ray diffraction (XRD) analysis, respectively. Fourier transform infra‐red (FTIR) results indicated that the obtained nanoparticles were stabilised and capped through the carbonyl and carboxylate ion groups possibly from flavonoids, terpenoids, phenolics and esters content of the extracts. In addition, the AgNPs were assessed for their biological potentials against some microbes and, also, their free radical scavenging ability was established. The AgNPs exhibited interesting antimicrobial and antioxidant properties better than the aqueous extract of A. afra.