Raman Scattering in Zn1-xTixO Nanoparticles Synthesized by Sol-Gel Method
Zn1-xTixO (x = 0, 0.16, 0.22, 0.31, 0.48) nanoparticles have been prepared by sol-gel method and annealed at 450°C in ambient environment. Raman spectroscopy study of ZnO nanoparticles, as well as the Ti-doped ZnO nanoparticles is carried out to analyze the crystallization, structure and defects present in the nanostructure materials. The Raman spectrum exhibits high intense peak at 437 cm-1 which is characteristic of wurtzite type-hexagonal structure of ZnO. While other low intense peak at 330 cm-1 and 574 cm-1 is associated with multiple-phonons scattering and oxygen vacancies, respectively, present in the ZnO nanoparticles. The intensity of peak correspond to 437 cm-1 and 574 cm-1 decreases with emerging a new peak correspond to 230 cm-1 upon increasing the Ti more fraction in the ZnO. After annealing the Zn1-xTixO nanopowder, all other peaks disappeared except the peaks correspond to 330 cm-1 and 437 cm-1 which intensity increased sharply –indicating improvement in the crystal quality.
Keywords - Sol-gel, Semiconductor, ZnO, Nanoparticle, Raman Spectrum.