First synthesis of monodispersed microparticles of copper oxide films by pulsed spray pyrolysis (PSP): structural, optical, and morphological investigations

This work describes the first synthesis of monodispersed systems by capitalizing on the Leidenfrost effect. We report herein the synthesis of monodispersed particles of copper oxide films by spray pyrolysis technique in pulsed mode. The aim of this work is to investigate the effect of different pulse sequences on the particles’ size. One pulse sequence consists of three spray-on durations $$\tau_{{{\text{on}}}}^{{{\text{spray}}}}$$ separated by two spray-off $$\tau_{{{\text{off}}}}^{{{\text{spray}}}}$$ time intervals. In this work, we have varied the $$\tau_{{{\text{off}}}}^{{{\text{spray}}}}$$ duration from 15 to 45 s by a step of 10 s and the spray-on period is kept constant on 15 s. The effect of the spray-off duration on structural, optical and morphological properties of copper oxide material is reported. Indeed, the obtained films are characterized by XRD, spectrophotometer, Raman spectroscopy, AFM, and SEM. It was revealed that the spray-off duration has a great impact on the copper oxide particles’ size.