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R.Karthick

R.Karthick

National College (Autonomous)

Title: ZnO: Sr nanoparticles: Enhanced photoluminescence, structural and antibacterial properties for optical and biomedical applications

Biography

Biography: R.Karthick

Abstract

Applications of ZnO nanomaterials in optoelectronics are still limited due to their insufficient photoluminescence efficiency. The ZnO nanostructures were synthesized by a soft chemical method. X-ray diffraction analysis confirmed that all the synthesized samples have hexagonal wurtzite structure. X-ray diffraction, photoluminescence confirmed that the dopant ions substitute for some of the lattice zinc ions, and furthermore, that Sr2+ and Sr3+ ions coexist.Comparison of the photoluminescence spectra of undoped and strontium-doped ZnO confirmed that strontium is responsible for the novel morphology. The average crystallite size of the nanoparticles was in the range of 42-56 nm. FESEM images reveal the synthesized NPs are in nanometer range with shapes are observed. The presence of strontium (Sr) in the host lattice was confirmed by EDAX spectroscopy. Similarly, an improved antibacterial activity against one Gram-positive as well as one Gram-negative bacteria was also observed for the ZnO:Sr nanoparticles.