Acceleration and drift reduction of MOX gas sensors using active sigma-delta controls based on dielectric excitation

Author, as appears in the article.: Sola-Penaftel, N; Manyosa, X; Navarrete, E; Ramos-Castro, J; Jimenez, V; Bermejo, S; Gracia, I; Llobet, E; Dominguez-Pumar, M

Department: Enginyeria Electrònica, Elèctrica i Automàtica

URV's Author/s: Llobet Valero, Eduard / Navarrete Gatell, Èric

Keywords: Quantitative-analysis; Metal oxide; Gas sensor; Dielectric excitation; Control; metal oxide; dielectric excitation; control; arrays; ammonia

Abstract: The objective of this paper is to apply a closed-loop control based on dielectric excitation to MOX gas sensors in order to improve their response time. The control implements a feedback loop in which temperature modulations keep constant the sensor reactance, measured at constant temperature. The required fast temperature switching has been implemented on MEMS microhotplates. The mean temperature generated by the control is the new output signal. This technique is applied to an in-house sensor made of WO3 nanowires decorated with gold nanoparticles to detect NH3 and to a commercial MEMS MOX sensor (CCS801).

Thematic Areas: Surfaces, coatings and films; Spectroscopy; Química; Odontología; Nutrição; Metals and alloys; Medicina ii; Medicina i; Materials chemistry; Materiais; Interdisciplinar; Instruments & instrumentation; Instrumentation; Farmacia; Engenharias iv; Engenharias iii; Engenharias ii; Engenharias i; Electronic, optical and magnetic materials; Electrochemistry; Electrical and electronic engineering; Educação física; Educação; Economia; Condensed matter physics; Ciências biológicas iii; Ciências biológicas ii; Ciências biológicas i; Ciências ambientais; Ciências agrárias i; Ciência de alimentos; Ciência da computação; Chemistry, analytical; Biotecnología; Biodiversidade; Astronomia / física; Analytical chemistry

licence for use: https://creativecommons.org/licenses/by/3.0/es/

Author's mail: eric.navarrete@urv.cat; eric.navarrete@urv.cat; eduard.llobet@urv.cat

Record's date: 2024-10-12

Paper version: info:eu-repo/semantics/acceptedVersion

Link to the original source: https://www.sciencedirect.com/science/article/abs/pii/S0925400522005822

Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/

Paper original source: Sensors And Actuators B-Chemical. 365 131940-

APA: Sola-Penaftel, N; Manyosa, X; Navarrete, E; Ramos-Castro, J; Jimenez, V; Bermejo, S; Gracia, I; Llobet, E; Dominguez-Pumar, M (2022). Acceleration and drift reduction of MOX gas sensors using active sigma-delta controls based on dielectric excitation. Sensors And Actuators B-Chemical, 365(), 131940-. DOI: 10.1016/j.snb.2022.131940

Article's DOI: 10.1016/j.snb.2022.131940

Entity: Universitat Rovira i Virgili

Journal publication year: 2022

Publication Type: Journal Publications