Synthesis of Colloidal Copper (Cu) Nanoparticles by Pulse Laser Ablation Method (Nd:YAG 1064 nm) in Deionized Water

Abstract

Copper nanoparticles are usually used for various fields, such as medical, energy, environmental, and others. Copper nanoparticles were successfully synthesized in deionized water (DIW) using the 1064 nm ND:YAG pulse laser ablation method at 85 mJ energy. The resulting colloidal nanoparticles are greenish in color. This study investigates the use of DIW liquid medium that can survive one day after being synthesized or changed. The result is that there is a change in the colloidal photo of copper (Cu) nanoparticles shortly after being synthesized and one day after being synthesized. There is a change in color to become clearer after the colloid is left alone for one day. Not only did the colloid photo change, but the absorbance of the UV-Vis testing of the Cu nanoparticle colloid also changed. Changes in UV-Vis absorption in colloids immediately after being synthesized and after colloids were left standing for one day decreased from 1.175 to 0.561, and experienced a shift in wavelength from 222.96 nm to 223.07 nm. The morphology of Cu nanoparticles was seen using FESEM with a spherical shape. The average size distribution of Cu nanoparticles is about 56.7 nm.