3 years ago

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

Lightweight, Room-Temperature CO2 Gas Sensor Based on Rare-Earth Metal-Free CompositesAn Impedance Study
Jiayin Yuan, Dorota Koziej, Alexander Schmid, Christoph Willa, Danick Briand
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.

Publisher URL: http://dx.doi.org/10.1021/acsami.7b07379

DOI: 10.1021/acsami.7b07379

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