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Optical and vibrational studies of surface modified ZnO nanostructures

In this paper, we report 150 MeV Ag3+ ions irradiation effect on ZnO nanoparticles prepared by sol-gel method. The fluence kept as 1012 and 1013 ions/cm3 using 15 UD Pelletron accelerator. The pristine as well as irradiated ZnO nanostructures were characterized by XRD, photoluminescence and FTIR to study the radiation induced effects on the local structure and optical properties. Irradiation with the fluence changes the colour of the sample from white to yellow. XRD measurement shows prepared particles are in hexagonal wurtzite structure and irradiation induces significant change in the lattice parameters. Photoluminescence measurements are done at the excitation wavelength of 335 nm, a broad spectrum consists near band edge emission and defect related visible emission band. FTIR spectra show a band at 514 cm-1 is due to the stretching vibrations of Zn-O bond.