The excellent properties and various applications of metal nanoparticles make these nanoparticles widely used in many industries including energy, catalysis, environment, semiconductors and medicine, that to be given more attention by researchers [1, 2]. Among the various noble metal nanoparticles, copper based nanoparticles (copper, copper oxide and cuprous oxide) have received a lot of attention because of their many physico-chemical properties such as mechanical, optical, electrical and low cost [3–5]. These interesting and unique properties of copper have led to many applications in architectures, auto-motives, bio-medicals, solar cells, sensors, catalysis, optoelectronics and etc [6, 7]. Copper-based nanoparticles are synthesized by a variety of chemical and physical methods such as chemical precipitation, sol-gel, sonochemical, hydrothermal, electrochemical, photochemical, biological method, mechanical-ball milling, pulse laser ablation, micro-emulsion, thermal decomposition, microwave synthesis method and etc [8, 9, 18–22, 10–17].
Among the various synthesis methods, pulse laser ablation method in liquids is a unique technique for fabricating the nanoparticles. Laser ablation is an easy, simple, fast and laboratory safe method for synthesis of nanopraticles. On the other hand, because the laser ablation method is performed without the use of any surfactants, other chemical agents and toxic, hazardous chemical precursors for fabricating of nanoparticles, and thus is considered a green and environmentally friendly method, which is an advantage compared to other methods. Also in this method, the shape, morphology and size of the particles can be controlled by controlling the applied laser pulse [23–26]. The properties of synthesized nanopraticles for a variety of applications in different industries depended greatly on the shape, structure and size of the nanoparticles. Therefore, controlling the shape, size and structure were of great importance during in the synthesis process. Recent research demonstrated that the applied of external fields (such as magnetic field and electric field) could be a great effect in controlling the shape and size of particles in laser ablation method. Therefore, in this study, the external field was used in laser ablation method and their effect on the size, shape and properties of copper nanoparticles was investigated.
The aim of this study, the synthesis of copper nanoparticles by laser ablation method in the presence of a constant magnetic field and different electric fields. Also, the structure, morphology and properties of nanoparticles synthesized under different conditions were studied by using XRD, FTIR, RAMAN, UV–Vis spectrum, FE-SEM and TEM analyzes.