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

Julien George (1) , Aymen Abdelghani (1) , Prince Bahoumina (2) , Olivier Tantot (1) , Dominique Baillargeat (1) , Kamel Frigui (1) , Stéphane Bila (1) , Hamida Hallil (2) , Corinne Dejous (2)

1 XLIM-SRF - Systèmes RF
2 IMS - Laboratoire de l'intégration, du matériau au système

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.

Mots clés: dielectric characterization; inkjet printing; heating influence; gas sensor; RF structure; PEDOT: PSS-MWCNT; Flexible substrate

Domaines: Sciences de l'ingénieur [physics]; Electromagnétisme; Sciences de l'ingénieur [physics]; Electronique; Physique [physics]; Physique [physics]; Instrumentations et Détecteurs [physics.ins-det]

Julien George, Aymen Abdelghani, Prince Bahoumina, Olivier Tantot, Dominique Baillargeat, et al.. CNT-Based Inkjet-Printed RF Gas Sensor: Modification of Substrate Properties during the Fabrication Process. Sensors, 2019, 19 (8), pp.1768. ⟨10.3390/s19081768⟩. ⟨hal-02103220⟩