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Environmentally-friendly cellulose nanofibre sheets for humidity sensing in microwave frequencies

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Ayissi Eyebe, G. et Bideau, B. et Boubekeur, N. et Loranger, É et Domingue, F. (2017). Environmentally-friendly cellulose nanofibre sheets for humidity sensing in microwave frequencies. Sensors and Actuators B: Chemical, 245 . p. 484-492. ISSN 0925-4005 DOI 10.1016/j.snb.2017.01.130

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Résumé

This paper investigates environment friendly cellulose nanofibres (CNF) as new and sensitive material for humidity sensing in RF/microwave frequencies. CNF sheets were fabricated by sonocatalyzed TEMPO process and physically characterized. Humidity sensing investigation was performed with CNF sheets taped on the top of circuits in coplanar waveguide (CPW) technology. This investigation includes sensitivity and dynamic range analysis with reflected waves along the CPW circuit through resonant frequency shift, and transmitted waves through S21 phase shift. Moreover, sheets with various amounts of CNF were used to study the influence of CNF weight on humidity sensing performances. Regarding the resonant frequency shift, the best sensitivity was measured with the weightier CNF film (71 g/m2), that is 2.82 MHz/%RH from 55%RH to 100%RH. Regarding the phase shift, the same film sensitivity is 0.7°/%RH from 70%RH to 100%RH, with a figure of merit of 7.43°/dB as a phase shifter. © 2017 Elsevier B.V.

Type de document: Article
Mots-clés libres: cellulose humidity sensor microwave resonator renewable sensing material TEMPO oxidation coplanar waveguides frequency shift keying microwave devices microwave resonators microwave sensors nanofibers natural frequencies phase shift cellulose nanofibres coplanar waveguide technology dynamic range analysis environment friendly resonant frequency shift sensing material sensitive materials Tempo oxidations humidity sensors cellulose fibers frequency humidity oxidation sensitivity sensors
Date de dépôt: 15 juill. 2021 19:15
Dernière modification: 15 juill. 2021 19:15
Version du document déposé: Post-print (version corrigée et acceptée)
URI: https://depot-e.uqtr.ca/id/eprint/9647

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