Autor según el artículo: Díaz, F. Aguiló, M. Llobet, E. Ferré-Borrull, J. Pujol, M.C. Martucci, A. Cittadini, M. Diaz Diaz, A.F. Qadri, M.U.

Departamento: Química Física i Inorgànica Enginyeria Electrònica, Elèctrica i Automàtica

e-ISSN: 1424-8220

Resumen: 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.

Acceso a la licencia de uso: https://creativecommons.org/licenses/by/3.0/es/

Palabra clave otro idioma: CO Gas Optical gas sensing Platinum nanoparticles

Página final: 11443

Volumen de revista: 14

Versión del articulo depositado: info:eu-repo/semantics/publishedVersion

Enlace a la fuente original: http://www.mdpi.com/1424-8220/14/7/11427

DOI del artículo: 10.3390/s140711427

Entidad: Universitat Rovira i Virgili.

Año de publicación de la revista: 2014

Página inicial: 11427