Preparation and characterization of PbS nanoparticles by laser ablation technique

Nd:Yag laser with wavelength ( λ ) = 1064 nm and different energies (300, 400, and 500) mJ was used to prepare PbS nanoparticles in aromatic solvent benzene for the first time in this work according to our knowledge . A liquid medium was a benzene for ablation to prevent the PbS QDs from forming clumps. UV–Vis spectroscopy, X-ray diffraction (XRD), TEM, FTIR, and photoluminescence measurement were used to examine the optic, structural, as well as morphological features of PbS nanoparticles. According to XRD patterns, the synthesized PbS NPs exhibit a nanocrystalline and cubic (FCC) structure. The direct optical energy gap of PbS NPs discovered to be within the range of 2.7 eV. The photoluminescence emission spectra and excitation spectra of PbS the emission peak fixed around 359–584 nm, the crystallites sizes are found from 3–11 nm recorded for the first time in benzene.