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Local Structural Disorder and Relaxation in SnO2Nanostructures Studied by119Sn MAS NMR and119Sn Mössbauer Spectroscopy

Indris, Sylvio ; Scheuermann, Marco ; Becker, Sebastian M. ; Šepelák, Vladimir ; Kruk, Robert ; Suffner, Jens ; Gyger, Fabian ; Feldmann, Claus ; Ulrich, Anne S. ; Hahn, Horst (2011)
Local Structural Disorder and Relaxation in SnO2Nanostructures Studied by119Sn MAS NMR and119Sn Mössbauer Spectroscopy.
In: The Journal of Physical Chemistry C, 115 (14)
doi: 10.1021/jp200651m
Artikel, Bibliographie

Kurzbeschreibung (Abstract)

We studied the local structural disorder and relaxation in different nanostructures of SnO2 by using 119Sn MAS NMR in combination with 119Sn 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 SnO6 octahedra in the coarse-grained material show a well-known distortion and thus large electric field gradients, the nanocrystalline SnO2 exhibits a structural relaxation leading to a distribution of local environments and more symmetric octahedra. The SnO2 hollow spheres show strong local disorder in combination with highly asymmetric environments around the Sn atoms.

Typ des Eintrags: Artikel
Erschienen: 2011
Autor(en): Indris, Sylvio ; Scheuermann, Marco ; Becker, Sebastian M. ; Šepelák, Vladimir ; Kruk, Robert ; Suffner, Jens ; Gyger, Fabian ; Feldmann, Claus ; Ulrich, Anne S. ; Hahn, Horst
Art des Eintrags: Bibliographie
Titel: Local Structural Disorder and Relaxation in SnO2Nanostructures Studied by119Sn MAS NMR and119Sn Mössbauer Spectroscopy
Sprache: Englisch
Publikationsjahr: 14 April 2011
Verlag: ACS Publications
Titel der Zeitschrift, Zeitung oder Schriftenreihe: The Journal of Physical Chemistry C
Jahrgang/Volume einer Zeitschrift: 115
(Heft-)Nummer: 14
DOI: 10.1021/jp200651m
Kurzbeschreibung (Abstract):

We studied the local structural disorder and relaxation in different nanostructures of SnO2 by using 119Sn MAS NMR in combination with 119Sn 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 SnO6 octahedra in the coarse-grained material show a well-known distortion and thus large electric field gradients, the nanocrystalline SnO2 exhibits a structural relaxation leading to a distribution of local environments and more symmetric octahedra. The SnO2 hollow spheres show strong local disorder in combination with highly asymmetric environments around the Sn atoms.

Fachbereich(e)/-gebiet(e): 11 Fachbereich Material- und Geowissenschaften
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft
11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Gemeinschaftslabor Nanomaterialien
Hinterlegungsdatum: 31 Jan 2014 10:24
Letzte Änderung: 30 Jan 2019 10:37
PPN:
Sponsoren: We are grateful to the German Ministry for Education and Research as well as to the DFG Center for Functional Nanostructures (CFN) at the Karlsruhe Institute of Technology (KIT) for financial support., J.S. and H.H. are grateful for financial support by the State of Hesse.
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