Author, as appears in the article.: Radu Ionescu; Maciej Trawka; Janusz Smulkoa; Lech Hasse; Claes-Göran Granqvist; Fatima Ezahra Annanouch
Department: Enginyeria Electrònica, Elèctrica i Automàtica
URV's Author/s: IONESCU, SEPTIMIU RADU; Maciej Trawka; Janusz Smulkoa; Lech Hasse; Claes-Göran Granqvist; Fatima Ezahra Annanouch
Keywords: sensitivity Noise spectroscopy Gas sensors
Abstract: The sensitivity and selectivity of WO3-based gas sensors can be enhanced by UV-irradiation-induced modulation, especially if different wavelengths are employed. We used fluctuation-enhanced gas sensing, based on measurements of resistance fluctuations in the gas sensor, to study the effects of such modulation on the noise intensity for ambient atmospheres of synthetic air without and with additions of small amounts of ethanol, methane and formaldehyde. Our data confirmed that the method is energy efficient and can be applied to improve gas detection sensitivity and selectivity. The results are strongly dependent on the gaseous species, and a single UV-modulated WO3-based gas sensor discriminate between different gases.
Research group: Microsystems and Nanotechnologies for Chemical Analysis
Thematic Areas: Electronic engineering Ingeniería electrónica Enginyeria electrònica
licence for use: https://creativecommons.org/licenses/by/3.0/es/
ISSN: 0925-4005
Author identifier: 0000-0001-6211-0035; n/a; n/a; n/a; n/a; n/a
Record's date: 2016-05-30
Last page: 461
Journal volume: 234
Papper version: info:eu-repo/semantics/acceptedVersion
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Entity: Universitat Rovira i Virgili
Journal publication year: 2016
First page: 453
Publication Type: Article Artículo Article
Repositori URV