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

Christoph Willa | Zendy; Alexander Schmid | Zendy; D. Briand | Zendy; Jiayin Yuan | Zendy; Dorota Koziej | Zendy

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

Author(s) -

Christoph Willa,

Alexander Schmid,

D. Briand,

Jiayin Yuan,

Dorota Koziej

Publication year - 2017

Publication title -

acs applied materials and interfaces

Language(s) - Uncategorized

Resource type - Journals

SCImago Journal Rank - 2.535

H-Index - 228

eISSN - 1944-8252

pISSN - 1944-8244

DOI - 10.1021/acsami.7b07379

Subject(s) - materials science , composite material , composite number , ionic liquid , metal , electrical impedance , rare earth , liquid metal , metallurgy , catalysis , biochemistry , chemistry , electrical engineering , engineering

We report a light, flexible, and low-power poly(ionic liquid)/alumina composite CO 2 sensor. We monitor the direct-current resistance changes as a function of CO 2 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 CO 2 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.

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