Photoluminescence studies of lysozyme mediated zinc oxide (ZnO) nanoparticles

Ultraviolet Photoluminescence spectroscopy was employed to study optical properties of lysozyme mediated zinc oxide (ZnO) nanoparticles. The Zinc oxide nanoparticles using lysozyme (L: ZnO) were prepared through a facile synthesis. The samples were annealed at 550 ^oC for 2 hours. Third harmonic laser (260 nm) generated from the Ti: sapphire laser was used for optical excitation in the experiments. Photoluminescence spectrum measured at low temperature has emission peaks around 3.3 eV and a broad emission around 2.45 eV. We performed temperature and excitation power dependent photoluminescence measurements to identify the origin of the emission peaks in the spectra. We will present our findings on the optical properties of lysozyme mediated zinc oxide nanoparticles and discuss the effect of lysozyme in the optical properties of ZnO nanoparticles.