The FTIR spectra of Ag/Ag2O composites doped with silver nanoparticles

Abstract

In this work, we studied the effect of silver nanoparticles on the IR absorption mechanism in Ag/Ag2O composites. Ag/Ag2O composites were prepared by exposing silver films prepared by thermal evaporation to oxygen plasma afterglow. The infrared spectra of these samples were analysed. The results obtained showed that, the individual silver nanoparticles affect the vibrations of chemical bonds in Ag/Ag2O composites, and this is inferred from the gradual decrease in intensity when moving towards lower wavenumbers. In addition, it was found that the effect of individual silver nanoparticles is greatest in the frequency range of Ag–O bond vibrations and becomes weaker in the case of bonds with higher vibration energies.

Keywords

• Silver oxide
• thin film
• individual silver nanoparticles
• thermal evaporation
• oxygen plasma afterglow
• FTIR spectroscopy