EXAFS Study of Dopant Segregation (Zn, Nb) in Nanocrystalline Anatase (TiO2)
Source abstract
Abstract
Segregation of an acceptor (Zn) and a donor dopant (Nb) in nanocrystalline anatase was studied by EXAFS spectroscopy. Different dopant concentrations between 0.1 and 1 at. % were investigated, and similar results were found for nanocrystalline powders and nanocrystalline ceramics made by hot-pressing the powders. Niobium did not segregate whatever the concentration, whereas zinc segregation was found above 0.1 at. %. These results can be interpreted based on defect thermodynamics, in the framework of a space charge segregation model.
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Research context
OpenAlex topics: Quantum Dots Synthesis And Properties · Copper-based nanomaterials and applications · Chalcogenide Semiconductor Thin Films
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Affiliations
MADIREL (UMR 6121), Université de Provence-CNRS, Centre St Jérôme, 13397 Marseille Cedex 20, France, and Functional Materials Group, School of Physical Sciences, University of Kent, Canterbury, Kent CT2 7NR, U.K.
References (24)
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