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Morphology and Particle Size of Di(ethylene glycol) Mediated Metallic Copper Nanoparticles

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Cu nanoparticles were prepared in di(ethylene glycol) by a reduction reaction of Cu (II) acetate precursor to metallic Cu. The size and morphology of the synthesized particles were studied in dependence of the concentration of the starting compound and the temperature conditions of reaction were varied to determine the correlation with the size and morphology of the synthesized particles. The morphology and size of the resulting copper (I) oxide as an intermediate product and metallic Cu particles as a final product are strongly dependent on the concentration of the starting compound, thus indicating differences in the mechanism of the reduction reaction and, consequently, the mechanism of particle formation. At low concentrations (0.01 and 0.1 mol/L), an organo-metallic copper complex intermediate forms crystalline 10–100 nm thick and up to 10 m long nanowires organized in dendritic spheres with a diameter of 5–50 m, which further transform into Cu2O. Cu-di(ethylene glycolate) complex has an as yet undescribed crystalline structure. At a high precursor concentration (1 mol/L), the intermediate forms partly amorphous and partly crystalline Cu2O. The reduction of Cu2O to metallic Cu takes place between 190–200 °C. The smallest average particle size (100 nm) and the narrowest particle size distribution was obtained at a Cu (II) acetate concentration of 0.1 mol/L.
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Keywords: ELECTRON MICROSCOPY; METALLIC CU; SPECTROSCOPY; TRANSITION METAL OXIDES; X-RAY METHODS

Document Type: Research Article

Publication date: 2008-07-01

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  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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