Journal
SENSORS
Volume 19, Issue 8, Pages -Publisher
MDPI
DOI: 10.3390/s19081768
Keywords
dielectric characterization; inkjet printing; heating influence; gas sensor; RF structure; PEDOT: PSS-MWCNT; Flexible substrate
Funding
- Agence Nationale de la Recherche (ANR) [ANR-13-BS03-0010]
- technology network RENATECH
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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.
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