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- W2149105757 abstract "Microporous silica-based materials SiO <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> -Al <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2</sub> O <sub xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>3</sub> -NiO with a predominant pore size in the range 8-20 Aring, prepared by the sol-gel method by variation in Ni <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>2+</sup> concentrations from 0 to 30 weight %, have been characterized by X-ray diffraction, X-ray photoelectron spectroscopy. The nature of the nickel centers has been studied by magnetic susceptibility measurements supported by the XPS and X-ray experiments. It has been shown that these centers represent NiO and Ni <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0</sup> (observed at high nickel loadings) aggregated into nanoparticles. The Ni <sup xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>0</sup> nanoparticles are responsible for the room-temperature ferromagnetic behavior of the materials prepared with high nickel loadings." @default.
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- W2149105757 date "2008-08-01" @default.
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- W2149105757 title "Formation of Ni/NiO Nanoparticles in Supermicroporous Silica-Based SiO2-Al2O3-NiO Materials: Structural and Magnetic Studies" @default.
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- W2149105757 doi "https://doi.org/10.1109/nano.2008.236" @default.
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