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Ni(OH)2 was reduced by ethylene glycol, in the presence of polyvinylpyrrolidone (PVP) under microwave (MW) heating in a pulse mode and oil-bath heating. The temperature profile in the two heating meth...ods was controlled to be identical in order to determine whether the role of MW irradiation for the preparation of nickel nanoparticles is only thermal or not. Aggregated spherical nickel nanoparticles with diameters of 52 nm were produced under MW heating for 35 min, while larger monodispersed spherical nanoparticles with diameters of 204 nm were prepared in oil-bath heating for 35 min. Different size and dispersion pattern of nanoparticles under the two heating methods indicated that MW irradiation affects the nucleation, growth, and aggregation of Ni nanoparticles.続きを見る
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