Biosynthesis of silver nanoparticles by Achillea eriophora DC extract

Document Type : Original Research Paper


1 1 M. Sc. student of Agricultural Biotechnology, Maybod Branch, Islamic Azad University, Maybod, Iran

2 Department of Agronomy, Maybod Branch, Islamic Azad University, Maybod, Iran.



Nanoparticles have a wide range of applications due to their unique biological and
physicochemical properties. Among metal nanoparticles, silver nanoparticles
are of special importance due to their wide application. Although there are several
chemical and physical methods for the synthesis of silver nanoparticles, biological
methods are more suitable due to their time and low energy, non-use of toxic
solvents, and biocompatibility. In this study, an aqueous extract of dried flowers of
Achillea eriophora (Shirazi yarrow) was used as a reducing agent for the synthesis
of silver nanoparticles. The reaction was performed at room temperature
and showed a change in color from pale yellow to dark brown to form silver
nanoparticles. UV-Vis spectroscopy, scanning electron microscopy (SEM), Fourier
transforms infrared spectroscopy (FTIR) and particle sizing (PSA) were used to
evaluate the physicochemical properties of the formed nanoparticles. The
presence of an absorption peak at a wavelength of about 450 nm confirmed the
formation of silver nanoparticles. SEM results showed that the shape of particles
was spherical and their particle size ranges were from 38 to 144 nm. FTIR results
also showed the role of reducing groups on the surface of nanoparticles. The
results of PSA showed that the particles have low polydispersity and the extract
is desirable for the synthesis of silver nanoparticles. Based on these results, it
can be said that the synthesis of silver nanoparticles by Shirazi yarrow extract
is a simple, fast, non-toxic, and biocompatible method and can be used in food,
medicine, and agriculture.