cost-effective environmental friendly alternative to chemical and
physical methods. Consequently, silver nanoparticles have been
synthesized by using microorganisms and plant extracts [5]. The
synthesis of nanoparticles using plant extract is potentially advantageous
over microorganisms due to the ease of biohazards and the
culture of the microorganisms. Silver nanoparticles have been synthesized
by using various plant extracts including hibiscus (Hibiscus
rosa sinensis) leaf extract, neem (Azadirachta indica) leaf broth, black
tea leaf extracts, Indian gooseberry (Emblica officinalis) fruit extract,
sundried camphor (Cinnamomum camphora) leaves, and aloe leaf
extract [4,6]. Recently, silver and iron nanoparticles of various sizes
and morphologies have been synthesized by using coffee and green
tea extract. Stable mono-dispersed spherical silver nanoparticles
ranging from 5 to 100 nm are obtained by using aqueous coffee and
tea extract