Chadwick, A.V. and Knauth, P. and Weibel, A. and Mountjoy, G. and Bouchet, R. (2003) EXAFS study of dopant segregation (Zn, Nb) in nanocrystalline anatase (TiO2). CHEMISTRY OF MATERIALS, 15 (26). pp. 4996-5002. ISSN 0897-4756 .
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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.
| Item Type: | Article |
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| Subjects: | Q Science |
| Divisions: | Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group Faculties > Science Technology and Medical Studies > School of Physical Sciences |
| Depositing User: | Alan Chadwick |
| Date Deposited: | 15 Sep 2008 12:49 |
| Last Modified: | 06 Sep 2011 00:21 |
| Resource URI: | http://kar.kent.ac.uk/id/eprint/9379 (The current URI for this page, for reference purposes) |
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