Bimetallic BaTiO3 and Cu nanoparticle synthesis via pulsed laser ablation in liquid of powder targets

Abstract

Listen

Translate article

Laser processing has become a viable method of synthesising bimetallic and biomolecule-free nanoparticles. Laser processing enable for different materials to be processed via the same laser system with ease, unlike chemical and biological methods that require special equipment/organisms for each material. The objective of this paper is to study the laser processing of powders for the fabrication of nanoparticles of various types, shapes, sizes and concentration. A Nd:YAG 1064 nm laser system was used to perform ablation processes of Cu and BaTiO3 powders under isopropyl alcohol, hydrochloric acid and ammonium buffer solution. This produced nanoparticles of various shapes including rods, spheres and pyramids and various sizes (14–280 nm). The effect of the laser processing parameters such as hatch spacing (10 or 30 μm) and scan speed (2 or 3 m/s) were examined. These processing parameters are seldom studied in the literature. Furthermore, this paper describes a way to produce nanoparticles from powder targets instead of the conventional rod, plate or thin film targets that are difficult to reuse. However, powders are compatible with a limited number of liquids than rods, plates and thin films and this issue is addressed herein.