Influence of electric explosion parameters on the component composition and spectral-optical properties of synthesized nickel nanoparticles
The object of the study is nanoparticles synthesized in electric explosion plasma of nickel foil strips in distilled water. The relevance of the work is due to the need to develop technologies for obtaining nanoparticles by electroexplosive method. The aim of this work is to experimentally investigate the effect of electric explosion parameters in distilled water on the component composition and spectral and optical properties of synthesized nickel nanoparticles. In the introduction, a brief review of the literature on the application of electric explosion of conductors for the synthesis of nanoparticles is presented. The main part of the paper describes the experimental setup, describes the research methodology and presents the obtained results. The structure and morphology of the obtained nanoparticles and their conglomerates were studied by AFM microscopy. The morphological diversity of nanoparticles up to 100 nm is not high. The obtained nanoparticles resemble flattened spheres in shape. The peculiarity of electroexplosive dispersion of nickel is the synthesis of sufficiently large nanoparticles. The dominant number of nanoparticles is located in the size range up to 200 nm. The number of large nanoparticles and conglomerates increases as the energy invested in the electric explosion increases. The profile of the size distribution shifts to the region of larger nanoparticle sizes. The number of large particles and conglomerates also increases as the number of exploded samples in one portion of water increases. The maximum of dimensional distributions shifts toward larger nanoparticle sizes. In the region of wavelengths larger than 300 nm, the optical density of nanosuspensions is almost independent of the operating voltage. As the number of blown samples in one portion of water increases, the optical density of nanosuspensions increases. The conclusions of the work done are formulated.