Nanostructured ZnO chemical gas sensors

Year: 2015

Authors: Galstyan V., Comini E., Baratto C., Faglia G., Sberveglieri G.

Autors Affiliation: Sensor Lab, CNR-INO, Via Valotti 9, 25133 Brescia, Italy

Abstract: The aim of this study is to report the fabrication and the gas sensing properties of ZnO nanostructures. The structures were obtained through electrochemical anodization and post-growth annealing of metallic Zn thin films. The morphology and the crystal structure of the samples were analyzed using scanning electron microscopy, X-ray Diffraction and micro-Raman spectroscopy. Morphological analysis showed that ZnO was obtained in shape of 25 nm diameter nanoparticles connected to each other forming chains. Gas sensing properties towards NO2, H-2 and CH4 were investigated too. The structures showed high and reversible response to NO2, H-2 and CH4, thus revealing that the obtained architecture of nanostructured ZnO is promising for chemical sensors. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.


Volume: 41 (10)      Pages from: 14239  to: 14244

More Information: The research leading to these results has received funding from the following projects:\”New approaches and methodologies for bioremediation of water contaminated by chlorinated aliphatic solvents (SUSBIOREM)\” (funded by the National Research Council (CNR) and Lombardia Region);
\”FIRB – Rete Nazionale di Ricerca sulle Nanoscienze ItalNanoNet\” (Protocollo: RBPR05JH2P, 2009-2013, funded by the Italian Ministry of Education);\”FIRB – Oxides at the nanoscale: multifunctionality and applications\” (Protocollo: RBAP115AYN, funded by the Italian Ministry of Education);\”Xnano\” (funded by Lombardia Region);\”ORAMA\” (grant agreement NMP3-LA-2010-246334, funded by the European Commission through its 7th Framework Program). The authors are also thankful to Francesca Barisani from the Department of Information Engineering (University of Brescia) for revision of English.

KeyWords: ZnO; Gas sensors; Nanostructures
DOI: 10.1016/j.ceramint.2015.07.052

Citations: 192
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