Scientific Results

Tailoring the textured surface of porous nanostructured NiO thin films for the detection of pollutant gases

Year: 2015

Authors: Kumar R., Baratto C., Faglia G., Sberveglieri G., Bontempi E., Borgese L.

Autors Affiliation: CNR-INO SENSOR Lab., Via Branze 35, 25133 Brescia, Italy;
University of Brescia, Dept. of Information Engineering, Via Valotti, 9, 25133 Brescia, Italy;
INSTM and Chemistry for Technologies Laboratory, University of Brescia, Department of Mechanical and Industrial Engineering, Via Branze, 38, 25133 Brescia, Italy

Abstract: In the present article, an experimental approach to detect pollutant gases in presence of humidity was applied for gas sensors based on p-type NiO thin films. NiO thin films were deposited by radio frequency magnetron sputtering in inert atmosphere using a NiO target. Thin films were investigated by scanning electron microscopy to observe their surface morphology. Crystal structure and vibrational study were investigated by X-ray diffraction and micro-Raman spectroscopy, respectively. It was observed that deposition temperature played a crucial role in the structural and surface morphology of NiO thin films. Sensing response of the nanostructured thin films to reducing and oxidizing gas was studied as a function of gas concentration and operating temperature. A double digit (12.3) response was observed towards ozone at 200 degrees C, while maximum response to ethanol and acetone was recorded at 400 degrees C. A correlation was established between sensing response and crystalline dimension for ozone sensing. The result showed that NiO thin films can be used as p-type metal oxide material for the fabrication of solid state gas sensors to detect low concentrations of ozone (70 ppb). (C) 2015 Published by Elsevier B.V.

Journal/Review: THIN SOLID FILMS

Volume: 583      Pages from: 233  to: 238

More Information: The research leading to these results has received funding from the European Communities 7th Framework Programme under grant agreement NMP3-LA-2010-246334. Financial support of the European Commission is therefore gratefully acknowledged.
KeyWords: Gas sensor; Nickel oxide; p-Type semiconductor; Micro-Raman spectroscopy; Sensing response
DOI: 10.1016/j.tsf.2015.04.004

Citations: 32
data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-24
References taken from IsiWeb of Knowledge: (subscribers only)
Connecting to view paper tab on IsiWeb: Click here
Connecting to view citations from IsiWeb: Click here

gdpr-image
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