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Sensors 2019, 19(8), 1768; https://doi.org/10.3390/s19081768

CNT-Based Inkjet-Printed RF Gas Sensor: Modification of Substrate Properties during the Fabrication Process

1
University of Limoges, CNRS, XLIM UMR 7252, F-87060 Limoges, France
2
University of Bordeaux, Bordeaux INP/CNRS, IMS UMR 5218, F-33400 Talence, France
*
Author to whom correspondence should be addressed.
Received: 25 February 2019 / Revised: 31 March 2019 / Accepted: 10 April 2019 / Published: 13 April 2019
(This article belongs to the Special Issue Passive Electromagnetic Sensors for Autonomous Wireless Networks)
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Abstract

This paper presents the feasibility of a fully inkjet-printed, microwave flexible gas sensor based on a resonant electromagnetic transducer in microstrip technology and the impact of the printing process that affects the characteristics of the gas sensor. The sensor is fabricated using silver ink and multi-wall carbon nanotubes (MWCNTs) embedded in poly (3,4-ethylenedioxythiophene) polystyrene (PEDOT: PSS-MWCNTs) as sensitive material for Volatile Organic Compounds (VOCs) detection. Particular attention is paid to the characterization of the printed materials and the paper substrate. The manufacturing process results in a change in relative permittivity of the paper substrate by nearly 20%. Electrical characterization, made in the presence of gas, validates our theoretical approach and the radiofrequency (RF) gas sensor proof of concept. View Full-Text
Keywords: dielectric characterization; inkjet printing; heating influence; gas sensor; RF structure; PEDOT: PSS-MWCNT; Flexible substrate dielectric characterization; inkjet printing; heating influence; gas sensor; RF structure; PEDOT: PSS-MWCNT; Flexible substrate
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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George, J.; Abdelghani, A.; Bahoumina, P.; Tantot, O.; Baillargeat, D.; Frigui, K.; Bila, S.; Hallil, H.; Dejous, C. CNT-Based Inkjet-Printed RF Gas Sensor: Modification of Substrate Properties during the Fabrication Process. Sensors 2019, 19, 1768.

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