Effect of assisted magnetic and electric fields on synthesis of Cu nanoparticles by laser ablation method and investigation of their structural properties

In this study, copper nanoparticles were synthesized and identified by laser ablation method. For the synthesis of copper nanoparticles, a constant magnetic field equal to 10 mT and different electric fields equal to 0, 10, 15, 20 and 25 V/Cm were applied and their effect on the properties and morphology of the nanoparticles were investigated. The synthesized nanoparticles were characterized using XRD, FTIR, RAMAN, UV–Vis spectrum, FE-SEM and TEM analyzes. The crystalline size calculated from xrd analysis were found to be around 17.1 nm (0 V), 14.2 nm (20 V), 12.1 nm (30 V), 10.7 nm (40 V) and 10.9 nm (50 V). The results of UV–Vis spectrum indicated the slight blue shift at about ∼570 nm that confirmed the size of nanoparticles was decreased by increasing the applied electric field. RAMAN and XRD analysis showed that the amount of copper nanoparticles were increased with increasing the applied electric field and also FTIR analysis confirmed that copper nanoparticles were formed. The FESEM images showed that with increasing electric field along with constant magnetic field, nanoparticles from spherical to flower-shaped and to rod-like were formed. The purity of the synthesized copper nanoparticles was confirmed by EDX spectra. TEM images of the nanoparticles showed that by increasing the electric field, the crystalline form of the nanoparticles shifted from large scales spherical particles to rod-like nanoparticles and then transformed to rod-like with very small spherical particles.