Cellulose Fibers Enable Near-Zero-Cost Electrical Sensing of Water-Soluble Gases

Anno: 2019

Autori: Barandun G., Soprani M., Naficy S., Grell M., Kasimatis M., Chiu K. L., Ponzoni A., Güder F.

Affiliazione autori: Imperial Coll London, Dept Bioengn, London SW7 2AZ, England; Univ Brescia, Dept Informat Engn, I-25123 Brescia, Italy; CNR, Natl Inst Opt, I-25123 Brescia, Italy; Univ Sydney, Sch Chem & Biomol Engn, Sydney, NSW 2006, Australia.

Abstract: We report an entirely new class of printed electrical gas sensors that are produced at near “zero cost”. This technology exploits the intrinsic hygroscopic properties of cellulose fibers within paper; although it feels and looks dry, paper contains substantial amount of moisture, adsorbed from the environment, enabling the use of wet chemical methods for sensing without manually adding water to the substrate. The sensors exhibit high sensitivity to water-soluble gases (e.g., lower limit of detection for NH3 < 200 parts-per-billion) with a fast and reversible response. The sensors show comparable or better performance (especially at high relative humidity) than most commercial ammonia sensors at a fraction of their price (<$0.02 per sensor). We demonstrate that the sensors proposed can be integrated into food packaging to monitor freshness (to reduce food waste and plastic pollution) or implemented into near-field-communication tags to function as wireless, battery-less gas sensors that can be interrogated with smartphones. Giornale/Rivista: ACS SENSORS

Volume: 4 (6)      Da Pagina: 1662  A: 1669

Maggiori informazioni: Financial support through EPSRC (No. EP/R010242/1) and EPSRC DTP (Reference No. 1846144) is acknolwedged.
Parole chiavi: Sensors, cellulose paper, waste prevention, food quality, RFID tags
DOI: 10.1021/acssensors.9b00555

Citazioni: 130
dati da “WEB OF SCIENCE” (of Thomson Reuters) aggiornati al: 2025-05-18
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