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1 Materials Science Poland

1 2007

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Submicron-sized hybrid SiO2-Ni powders produced with the sol-gel method

Borak B., Laskowski S., Heczko O., Aaltonen A., Baszczuk A., Jasiorski M., Soderberg O., Mazurek B., Oja M., Hannula S. P., Maruszewski K.

Materials Science Poland

2007

Vol. 25, No. 1

167--175

Magnetic powders based on metallic nickel nanoparticles encapsulated in submicron-sized spherical silica shells have been obtained and investigated. The nickel clusters were produced by the exploding wire method. The silica shells were prepared via the modified sol-gel Stober method, and the metallic particles were entrapped by their occlusion during silica powder formation. The obtained hybrid materials were investigated by electron microscopy, X-ray diffraction, magnetic, and potential techniques. The obtained materials can potentially be employed in such applications as magnetically controlled drug vectors or electromagnetic field shielding.