Biosynthesis of nanoparticles by plant extracts is currently under exploitation. Plant
extracts are very cost effective and eco-friendly and thus can be an economic and efficient
alternative for the large-scale synthesis of nanoparticles. We report on the use of
methanolic extract of Eucalyptus hybrida leaf in the extracellular biosynthesis of silver
nanoparticles. Bioactive silver nanoparticle synthesis by reacting the methanolic biomass
of Eucalyptus hybrida leaf with aqueous solutions of silver nitrate (AgNO3) at ambient
temperature. Formation of silver nanoparticles was confirmed by UV–visible
spectroscopy, X-ray diffraction patterns, Scherrer’s formula and scanning electron
microscopy (SEM) with Energy dispersive X-ray (EDX) patterns. The biomass of plants
produces their nanomaterials by a process called biomineralisation. Biological methods are
a good competent for the chemical procedures, which are environment friendly and
convenient.