Raman study of surface optical phonons in ZnO(Co) nanoparticles prepared by hydrothermal method

Abstract

On Raman scattering spectra of nanocrystaline samples ZnO(Co) prepared by use of the microwave assisted hydrothermal synthesis, surface optical phonons (SOP) where observed in the range of 519 - 572 cm-1. The mean crystalline size (33 - 300 nm) as well as the phase composition of obtained samples (ZnO, ZnCo2O4) where determinate with X - ray diffraction measurements. These measurements aloud us to study the change of SOP modes position with crystalline size and how change in concentration of doping element CoO influence the change of SOP modes intensity.

Keywords

• nanostructured materials
• optical properties
• light absorption and reflection
• surface optical phonon modes