ISSN:
1662-8985
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In the present work, sensing of ethanol on the ZnO thin films doped with Fe (5-50%)have been investigated. Nature of the sensing species in the nanosize Fe-doped ZnO (FeZnO)thin films has also been studied by in situ extended X-ray absorption fine structure (EXAFS)spectroscopy. By XRD, it is found that ZnO and ZnFe2O4 are the main compounds in the ZnO-Fethin films. The thin film containing 5% of Fe has a high sensitivity (Rair/Rethanol〉80) whensensing of ethanol at 300 K. On the contrary, the thin films with Fe fractions of 20-50% have avery low sensitivity to ethanol (Rair/Rethanol〈15). In the presence of ethanol, the EXAFS spectrashow that the bond distances of Zn-O and Fe-O in the thin films are 1.90 and 1.98 Å, respectivelyand restored to 1.91 and 1.97 Å in the absence of ethanol
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/41/transtech_doi~10.4028%252Fwww.scientific.net%252FAMR.47-50.1117.pdf
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