Abstract
Formation of platinum nanoparticles (Pt NPs) by Nd:YAG laser ablation of a platinum target in polar solvents, viz. distilled water (DW), absolute ethanol (ET), acetone (AC), and ethylene glycol (EG), was investigated. Characterization of the NPs in terms of size distribution, shape, optical properties, phase structure, crystalline nature, and molecular structure was carried out as a function of the nature of the liquid by transmission electron microscopy, scanning electron microscopy, ultraviolet–visible (UV–Vis) absorption spectroscopy, X-ray diffraction analysis, selected-area electron diffraction analysis, Raman spectroscopy, and Fourier-transform infrared spectroscopy. The interaction of the ablation plasma plume species with species produced by decomposition of the liquid resulted in formation of spherical Pt and PtO NPs with diameter ranging from 5 nm up to a maximum of 104 nm. The results evidence that the properties of the NPs were affected by the nature of the liquid, including thermodynamic parameters such as the dipole moment, boiling point, and viscosity.
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