Nanostructured ZnO chemical gas sensors. Issue 10 (December 2015)

• Record Type: Journal Article
• Authors: Galstyan, Vardan; Comini, Elisabetta; Baratto, Camilla; Faglia, Guido; Sberveglieri, Giorgio
• Is Part Of: Ceramics international. Volume 41:Issue 10(2015)Part B
• Page Start: 14239
• Page End: 14244
• Publication Date: 2015-12
• Subjects: D. ZnO -- Nanostructures -- Gas sensors; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2015.07.052
• Languages: English
• ISSNs: 0272-8842

Abstract

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, H2 and CH4 were investigated too. The structures showed high and reversible response to NO2, H2 and CH4, thus revealing that the obtained architecture of nanostructured ZnO is promising for chemical sensors.