Regensburg 2010 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 41: Nanoparticles and Composite Materials II
CPP 41.1: Vortrag
Donnerstag, 25. März 2010, 14:00–14:15, H48
Study of the Defect Structure of SnO2:F Nanoparticles by High-resolution Solid-State NMR — •Yamini Avadhut1, Johannes Weber1, Elin Hammarberg2, Claus Feldmann2, Inga Schellenberg3, Rainer Pöttgen3, and Jörn Schmedt auf der Günne1 — 1Department of Chemistry, Munich University (LMU), Munich, Germany — 2University of Karlsruhe (TH), Germany — 3Universität Münster, Germany
The defect structure of fluorine doped tin oxide (FTO) nano particles was investigated by using 119Sn,19F and 1H solid-state NMR [1]. FTO is a substitute of indium tin oxide, the most commonly used TCO. Fluorine doping is supposed to increase conductivity and is studied by solid state MAS NMR and 119Sn Mößbauer spectroscopy. Quantitative NMR [2], CPMAS, homonuclear dipolar recoupling and rotational echo double resonance experiments allowed us to study the doping homogeneity, dynamics. On the basis of the experimental results we discussed different models which explain the increase in conductivity of SnO2:F caused by fluorine doping and refine our view by ab initio calculations of different defect models.
[1] Y.S.Avadhut, J.Weber, E. Hammarberg, C.Feldmann, I.Schellenberg, R.Pöttgen, J.Schmedt auf der Günne in preparation. [2] Y.S.Avadhut, D.Schneider, and J.Schmedt auf der Günne, J. Magn. Reson., 201:1-6, 2009.