This work reports the attempts to carry out pulsed laser ablation in liquid (PLAL) for
synthesizing colloidal copper oxide nanoparticles (NPs). Copper oxide NPs was
synthesized by 7ns Nd:YAG laser ablation of high purity copper target immersed in
different solutions; ethanol, acetone, and water. The optical and morphological properties
of copper oxide NPs were investigated. It was found that the optical absorbance, energy
gap, size, and distribution of copper oxide nanoparticles are dependent on liquid type.
Plasmon peak was observed at 550nm for Cu NPs ablated in acetone and methanol
liquids, while it was disappeared for those ablated in water. Atomic Force Microscopy
(AFM) analysis showed that the average grain size of copper oxide particles ablated in
acetone, ethanol, and water were 276 nm, 300, and 360nm, respectively. Fourier
Transform Infrared (FTIR) was used to study the vibrational frequencies between the
bonds of atoms for a synthesized copper oxide NPs at different liquids. All these results
confirm the complete oxidation of ablated copper.
Keywords: Laser ablation, copper oxide, nanoparticles, liquids, AFM, FTIR .
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