NiO/ZnO Nanowire-heterostructures by Vapor Phase Growth for Gas Sensing

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• 作者：Navpreet Kaur ; ^{n.kaur001@unibs.it} ; Elisabetta Comini ; Nicola Poli ; Dario Zappa ; Giorgio Sberveglieri
• 关键词：Nickel oxide ; Zinc oxide ; Sputtering ; Nanowires ; Heterostructure ; Gas senosr
• 刊名：Procedia Engineering
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：168
• 期：Complete
• 页码：1140-1143
• 全文大小：398 K
• 卷排序：168

文摘

Physical interface between p and n-types semiconducting materials known as p-n junction or heterojunction represents the key technology in many electronic and optoelectronic devices such as gas sensors. In this work we are presenting a novel method for the growth of NiO/ZnO (NWs) based heterostructures with vapor phase mechanism and their preliminary sensing study for acetone. To fabricate the NiO/ZnO NWs heterostructures, firstly NiO nanowires were grown on alumina substrates with Vapor-Liquid-Solid (VLS) method and then Vapor-Solid (VS) method was used for the growth of ZnO nanowires on as grown NiO nanowires. The surface morphology of NiO nanowires and NiO/ZnO heterostructures were investigated with scanning electron microscopy (FE-SEM). Raman spectroscopy has also been used for the structural characterization of heterostructures. A set of conductromertric sensing devices based on NiO/ZnO heterostructures have been prepared. The preliminary sensing performance of NiO/ZnO NWs heterostructure devices towards acetone at temperature of 400°C is reported in this work.