Biomimetic synthesis and characterisation of ZnS nanoparticles in aqueous solution of lysozyme

Zinc sulphide nanoparticles were prepared by a simple biomolecule-assisted biomimetic method at room temperature. X-ray diffraction pattern confirmed the formation of a cubic zinc blende phase of ZnS nanocrystals. Transmission electron microscopy images revealed that the nanoparticles are nearly spherical in shape, with average diameter about 40 nm. The optical property of ZnS nanoparticles was studied by the ultraviolet–visible spectrum. Different template concentrations of lysozyme are used to investigate the influence of biomolecule on the formation of nanoparticles. Fourier transform infrared spectroscopy study suggested ZnS nanoparticles can react with functional groups of lysozyme including –OH and –NH.