Metallic Particles from Complexing Microcapsules Dispersed in a Silica Gel |
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Authors: | Mireille Richard-Plouet Jean-Louis Guille Yves Frere Louis Danicher |
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Institution: | (1) Groupe des Matériaux Inorganiques Institut de Physique et de Chimie des Matériaux de Strasbourg, UMR 7504, 23, rue du Loess, 67037 Strasbourg Cedex, France;(2) Institut Charles Sadron, (UPR 22) 6, rue Boussingault, 67083 Strasbourg Cedex, France |
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Abstract: | A new process to control the distribution of metal nanoparticles is proposed. It involves the use of complexing microcapsules obtained by interfacial polycondensation. The latter are hollow spheres constituted of a polymer membrane, containing an insoluble active ingredient, such as a polyacrylic acid, which can complex Co2+ ions. These capsules are dispersed in a silica sol followed by thermal treatments and reduction under H2 which results in metallic Co nanoparticles confined in the capsules domains. The particles do not diffuse in the matrix. |
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Keywords: | complexing capsules Co nanoparticles sol-gel matrix |
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