Author, as appears in the article.: Díaz, F. Aguiló, M. Llobet, E. Ferré-Borrull, J. Pujol, M.C. Martucci, A. Cittadini, M. Diaz Diaz, A.F. Qadri, M.U.
Department: Química Física i Inorgànica Enginyeria Electrònica, Elèctrica i Automàtica
e-ISSN: 1424-8220
Abstract: Thin films of tungsten trioxide were deposited on quartz substrates by RF magnetron sputtering. Different annealing temperatures in the range from 423 to 973 K were used under ambient atmosphere. The influence of the annealing temperature on the structure and optical properties of the resulting WO3 thin films were studied. The surface morphology of the films is composed of grains with an average size near 70 nm for the films annealed between 773 and 973 K. Some of the WO3 thin films were also coated with Pt nanoparticles of about 45 nm in size. Spectrometric measurements of transmittance were carried out for both types of WO3 samples in the wavelength range from 200¿900 nm, to determine the effect of the exposure to two different gases namely H2 and CO. Films showed fast response and recovery times, in the range of few seconds. The addition of Pt nanoparticles enables reducing the operation temperature to room temperature.
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Keyword in other language: CO Gas Optical gas sensing Platinum nanoparticles
Last page: 11443
Journal volume: 14
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: http://www.mdpi.com/1424-8220/14/7/11427
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Article's DOI: 10.3390/s140711427
Entity: Universitat Rovira i Virgili.
Journal publication year: 2014
First page: 11427
Repositori URV