Nanocrystalline copper doped zinc oxide gas sensors

Chadwick, A.V. and Harsch, A. and Russell, N.V. and Tse, K.F. and Whitham, A.R. and Wilson, A. (1995) Nanocrystalline copper doped zinc oxide gas sensors. In: 7th Europhysical Conference on Defects in Insulating Materials (Eurodim 94), Lyon, France. (The full text of this publication is not available from this repository)

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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.

Item Type: Conference or workshop item (Other)
Uncontrolled keywords: nanocrystals; doped zinc oxide; EXAFS; gas sensing
Subjects: Q Science > Q Science (General)
Divisions: Faculties > Science Technology and Medical Studies > School of Engineering and Digital Arts
Depositing User: P. Ogbuji
Date Deposited: 06 Jun 2009 16:14
Last Modified: 08 May 2012 13:06
Resource URI: http://kar.kent.ac.uk/id/eprint/19751 (The current URI for this page, for reference purposes)
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