Scientific Results

NiO/ZnO nanowire-heterostructures by vapor phase growth for gas sensing

Year: 2016

Authors: Kaur N., Comini E., Poli N., Zappa D., Sberveglieri G.

Autors Affiliation: Univ Brescia, SENSOR Lab, Via D Valotti 9, I-25133 Brescia, Italy; Univ Brescia, CNR INO, Via D Valotti 9, I-25133 Brescia, Italy

Abstract: 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 VaporLiquid- 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 degrees C is reported in this work. (C) 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.

Conference title:

KeyWords: Nickel oxide; Zinc oxide; Sputtering; Nanowires; Heterostructure; Gas senosr

This site uses cookies. If you decide to continue browsing we consider that you accept their use. For more information about cookies and how to delete them please read our Info Policy on cookies use.
Read more