Journal
IET NANOBIOTECHNOLOGY
Volume 12, Issue 6, Pages 722-726Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-nbt.2017.0297
Keywords
silver; transmission electron microscopy; ultraviolet spectra; visible spectra; surface plasmon resonance; antibacterial activity; X-ray diffraction; microorganisms; nanoparticles; nanofabrication; Fourier transform infrared spectra; silver nanoparticles; reaction temperature; surface plasmon resonance; face-centred cubic nanoparticles; antioxidant properties; silver ion conversion; aqueous leaf extract; carboxylate ion group; antimicrobial properties; Artemisia afra; spherical nanoparticles; TEM; XRD; FTIR spectra; Ag; temperature 80 degC to 90 degC; time 30; 0 min; free radical scavenging; esters; phenolics; terpenoids; flavonoids; carbonyl ion group
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In this study, the conversion of silver ions into approximate to 30.74nm sized silver nanoparticles (AgNPs) was achieved in 30min at a reaction temperature of 80-90 degrees C in aqueous leaf extract of Artemisia afra. The synthesised AgNPs showed surface plasmon resonance in the range of 423-438nm. 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.
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