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Nanocrystalline copper doped zinc oxide gas sensors

By Alan V. Chadwick, A. Harsch, Nigel V. Russell, K.F. Tse, A.R. Whitham and A. Wilson

Abstract

Samples of nanocrystalline Cu doped ZnO have been prepared and characterised by several techniques including chemical analysis, X-ray powder diffraction and X-Ray absorption spectra (EXAFS). The particle sizes are typically less than 100 Angstrom on the largest diameter. The diffraction results show that lightly doped samples,less than 10 mole per cent Cu, are single phase with the ZnO crystal structure. The EXAFS results indicate that although the Zn2+ ions occupy normal cation sites the Cu2+ ions are in highly disordered sites, suggesting that there is possible surface aggregation. Gas sensing experiments show a good response to low ppm concentrations of toluene vapour

Topics: Q1
Publisher: Gordon Breach Sci Publ Ltd, C/O STBS Ltd
Year: 1995
DOI identifier: 10.1080/10420159508222692
OAI identifier: oai:kar.kent.ac.uk:19751
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