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Open AccessArticle

Portable Low-Cost Electronic Nose Based on Surface Acoustic Wave Sensors for the Detection of BTX Vapors in Air

1
SENSAVAN, Instituto de Tecnologías Físicas y de la Información (ITEFI), CSIC, Serrano 144, 28006 Madrid, Spain
2
Instituto de Ciencias Aplicadas y Tecnología (ICAT), Universidad Nacional Autónoma de México, Ciudad Universitaria, Ciudad de México 04510, Mexico
3
Departamento de Electrónica y Telecomunicaciones, Tecnoparque, Centro de la Industria, la Empresa y los Servicios, SENA, Neiva 410004, Colombia
4
Instituto de Microelectrónica de Barcelona (IMB), CSIC, Campus UAB, 08193 Bellaterra, Spain
*
Author to whom correspondence should be addressed.
Sensors 2019, 19(24), 5406; https://doi.org/10.3390/s19245406
Received: 3 November 2019 / Revised: 30 November 2019 / Accepted: 4 December 2019 / Published: 8 December 2019
(This article belongs to the Special Issue Electronic Noses)
A portable electronic nose based on surface acoustic wave (SAW) sensors is proposed in this work to detect toxic chemicals, which have a great potential to threaten the surrounding natural environment or adversely affect the health of people. We want to emphasize that ferrite nanoparticles, decorated (Au, Pt, Pd) and undecorated, have been used as sensitive coatings for the first time in these types of sensors. Furthermore, the proposed electronic nose incorporates signal conditioning and acquisition and transmission modules. The electronic nose was tested to low concentrations of benzene, toluene, and xylene, exhibiting excellent performance in terms of sensitivity, selectivity, and response time, indicating its potential as a monitoring system that can contribute to the detection of toxic compounds. View Full-Text
Keywords: portable electronic nose; Love-SAW sensor; surface acoustic wave; Fe2O3 sensitive layer; gas detection portable electronic nose; Love-SAW sensor; surface acoustic wave; Fe2O3 sensitive layer; gas detection
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MDPI and ACS Style

Matatagui, D.; Bahos, F.A.; Gràcia, I.; Horrillo, M.C. Portable Low-Cost Electronic Nose Based on Surface Acoustic Wave Sensors for the Detection of BTX Vapors in Air. Sensors 2019, 19, 5406.

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