Scientific Results

Gas sensing study of ZnO nanowire heterostructured with NiO for detection of pollutant gases

Year: 2014

Authors: Baratto C., Kumar R., Comini E. , Faglia G., Sberveglieri G.

Autors Affiliation: SENSOR Lab. CNR-INO and University of Brescia

Abstract: The use of metal oxide single crystalline nanowires for chemical sensing of pollutant gases has been proposed as a reliable solution to ensure high sensor performance due to small size of the crystallites and good stability over long term operation at high temperature. To obtain enhanced sensing capabilities of ZnO nws, we prepared composite nanostructures based on p-type NiO and n-type ZnO NWs that combine the different physical and chemical properties of individual components. The superior functional performances are demonstrated in the current work by testing functional properties of chemical sensors towards reducing and oxidizing gases. The ZnO/NiO heterostuctures showed better relative response towards acetone and ethanol, with a decrease in response and recovery times with respect to uncoated ZnO nws. This is especially evident at 400 degrees C and for a determined thickness of the NiO layer. (C) 2014 The Authors. Published by Elsevier Ltd.

Journal/Review: PROCEDIA ENGINEERING

Volume: 87      Pages from: 1091  to: 1094

More Information: European Commission, EC. NMP3-LA-2010-246334. – The research leading to these results has received funding from the European Communities 7th Framework Programme under grant agreement NMP3-LA-2010-246334. The financial support of the European Commission is therefore gratefully acknowledged.
KeyWords: NiO; ZnO nanowires; heterostuctures
DOI: 10.1016/j.proeng.2014.11.354

Citations: 5
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