Static and dynamic structure of ZnWO₄ nanoparticles

Static and dynamic structure of ZnWO₄ nanoparticles, synthesized by co-precipitation technique, has been studied by temperature dependent x-ray absorption spectroscopy at the Zn K-edge and W L₃-edge. Complementary experimental techniques, such as x-ray powder diffraction, Raman and photoluminescence spectroscopies, have been used to understand the variation of vibrational, optical, and structural properties of nanoparticles, compared to microcrystalline ZnWO₄. Our results indicate that the structure of nanoparticles experiences strong relaxation leading to the significant distortions of the WO₆ and ZnO₆ octahedra, being responsible for the changes in optical and vibrational properties.