Abstract
Silver nanoparticles were biosynthesized from Conyzacanadensis leaf extract with the help of a microwave oven. The UV-vis spectrum showed the maximum absorption at 441 nm, corresponding to the surface plasmon resonance of silver nanoparticles. Transmission electron microscope and scanning electron microscope images showed that the synthesized silver nanoparticles were spherical or near-spherical with an average diameter of 43.9 nm. X-ray diffraction demonstrated nanoparticles with a single-phase cubic structure. As-synthesized silver nanoparticles displayed prominent antifungal activity against Bipolaris maydis. The colony inhibition rate reached 88.6% when the concentration of nanosilver colloid was 100 μL·mL−1 (v/v). At such a concentration, no colony formation was observed on the solid plate. The diameter of the inhibition zone was 13.20 ± 1.12 mm. These results lay the foundation for the comprehensive control of plant pathogens using an environmentally friendly approach.
Highlights
Significant research has been conducted on the synthesis, characterization, and application of silver nanoparticles [7,8,9,10,11,12,13,14]
Silver nanoparticles improve the antimicrobial activity of silver and have proven to be efficient
The results showed that silver nanoparticles could inhibit the in vitro production of HBV RNA and extracellular virions [19]
Summary
It makes traditional substances into nanoscale materials, which display excellent performance, including optical, magnetic, physical, and chemical characteristics, compared with their bulk counterparts [4,5,6]. Silver nanoparticles improve the antimicrobial activity of silver and have proven to be efficient.
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