journal article·2011-04-14

Local Structural Disorder and Relaxation in SnO2 Nanostructures Studied by 119Sn MAS NMR and 119Sn Mössbauer Spectroscopy

Sylvio Indris, Marco Scheuermann, Sebastian M. Becker, Vladimir Šepelák, Robert Kruk, Jens Suffner, Fabian Gyger, Claus Feldmann, Anne S. Ulrich, Horst Hahn

The Journal of Physical Chemistry C· Volume 115· Issue 14
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Abstract

We studied the local structural disorder and relaxation in different nanostructures of SnO 2 by using 119 Sn MAS NMR in combination with 119 Sn Mössbauer spectroscopy. We investigated nanocrystalline powders with an average crystallite size of 8 nm as well as hollow spheres with a wall thickness of 3 nm and a diameter of 14 nm, and compared the results to coarse-grained materials. Whereas the uniform SnO 6 octahedra in the coarse-grained material show a well-known distortion and thus large electric field gradients, the nanocrystalline SnO 2 exhibits a structural relaxation leading to a distribution of local environments and more symmetric octahedra. The SnO 2 hollow spheres show strong local disorder in combination with highly asymmetric environments around the Sn atoms.
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Research context

OpenAlex topics: Advanced Condensed Matter Physics · Nuclear materials and radiation effects · Crystal Structures and Properties

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Affiliations

Institute of Nanotechnology, Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany

DFG-Center for Functional Nanostructures (CFN), Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1A, 76131 Karlsruhe, Germany

Joint Research Laboratory Nanomaterials, Technical University Darmstadt − Karlsruhe Institute of Technology, Petersenstr. 32, 64287 Darmstadt, Germany

Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesser Str. 15, 76131 Karlsruhe, Germany

Institute of Organic Chemistry, Karlsruhe Institute of Technology, Fritz-Haber-Weg 6, 76131 Karlsruhe, Germany

Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology, P.O. Box 3640, 76021 Karlsruhe, Germany

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