Biosynthesis ofγ‐Fe2O3@CuO core–shell nanoclusters using aqueous extract ofSesbania grandiflora Linnfresh leaves, its characterisation, and antimicrobial activity studies againstStaphylococcus aureusstrains

Abstract

The present study reports an eco-friendly and rapid method for the synthesis of core–shell nanoclusters using the modified reverse micelle method. It is a green synthetic method which uses Sesbania grandiflora Linn extract which acts as a reducing and capping agent. It is observed that this method is very fast and convenient and the nanoclusters are formed with 5–10 min of the reaction time without using harsh conditions. The core–shell nanoclusters so prepared were characterised using UV–Vis spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Further, their effective antibacterial activity towards the gram-positive bacteria Staphylococcus aureus was found to be due to their smaller particle size.