Structural characteristics of oxide nanosphere supported metal nanoparticles |
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| Authors: | H. Hofmeister P.-T. Miclea M. Steen W. Mörke H. Drevs |
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| Affiliation: | (1) Max Planck Institute of Microstructure Physics, Weinberg 2, D-06120 Halle, Germany;(2) Chemistry Department, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Str. 2, D-06120 Halle, Germany;(3) Engineering & Natural Sciences Department, University of Applied Sciences Merseburg, Geusaer Str. 88, D-06217 Merseburg, Germany;(4) Nanophotonic Materials Group, University of Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany |
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| Abstract: | Structural characterization by transmission electron microscopy of metal nanoparticle coatings on oxide nanospheres has been employed to point out the potential of such materials for use as porous support model catalysts. On silica and titania nanospheres of various origins surface-mediated metal deposition at mild temperature conditions has been utilized to fabricate Pt, Pd, Ag, and Au nanoparticle coatings on the oxide supports. Promising coating characteristics have been achieved for Ag and Au nanoparticles by direct reduction on terminating hydroxyl-rich St?ber silica. A high-resolution electron microscopy analysis directed to surface stress, lattice contraction and planar lattice defects of the latter particles revealed no strong metal-support interaction. |
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| Keywords: | metal nanoparticles oxide nanospheres electron microscopy surface stress lattice defects |
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