Nanostructured ZnO chemical gas sensors

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• 作者：Vardan Galstyan ; ^{vardan.galstyan@unibs.it" class="auth_mail" title="E-mail the corresponding author} ; Elisabetta Comini ; Camilla Baratto ; Guido Faglia ; Giorgio Sberveglieri
• 关键词：D. ZnO ; Nanostructures ; Gas sensors
• 刊名：Ceramics International
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：41
• 期：10
• 页码：14239-14244
• 全文大小：2140 K

文摘

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.