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Lightweight, Room-Temperature CO₂ Gas Sensor Based on Rare-Earth Metal-Free Composites-An Impedance Study.

ABSTRACT: We report a light, flexible, and low-power poly(ionic liquid)/alumina composite CO₂ sensor. We monitor the direct-current resistance changes as a function of CO₂ concentration and relative humidity and demonstrate fast and reversible sensing kinetics. Moreover, on the basis of the alternating-current impedance measurements we propose a sensing mechanism related to proton conduction and gas diffusion. The findings presented herein will promote the development of organic/inorganic composite CO₂ gas sensors. In the future, such sensors will be useful for numerous practical applications ranging from indoor air quality control to the monitoring of manufacturing processes.

SUBMITTER: Willa C

PROVIDER: S-EPMC5543392 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature

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Lightweight, Room-Temperature CO2 Gas Sensor Based on Rare-Earth Metal-Free Composites-An Impedance Study.

Willa Christoph C Schmid Alexander A Briand Danick D Yuan Jiayin J Koziej Dorota D

ACS applied materials & interfaces 20170720 30

We report a light, flexible, and low-power poly(ionic liquid)/alumina composite CO2 sensor. We monitor the direct-current resistance changes as a function of CO2 concentration and relative humidity and demonstrate fast and reversible sensing kinetics. Moreover, on the basis of the alternating-current impedance measurements we propose a sensing mechanism related to proton conduction and gas diffusion. The findings presented herein will promote the development of organic/inor ...[more]

PMID: 28726384

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