Ionic-liquid based electrochemical ethylene sensor
conference paper
We present an electrochemical ethylene sensor that exploits a thin ionic-liquid (IL) layer as electrolyte. ILs are fluids that completely consist of ions at room temperature and have emerged as extremely promising electrolytes for the following reasons: first, the vapor pressure is practically negligible and therefore even thin films remain stable over time. Second, the solubility of ethylene is higher compared to water leading to an enhanced current. Finally, a thin layer leads to effective ethylene diffusion and therefore enhanced sensor current and response time. We show that ethylene can be detected in a specific potential window and a linear response up to 200 ppm with a detection limit of 25 ppm has been achieved. We foresee that our approach could be extended to other gases and ILs could become widespread in electrochemical gas sensors. © 2011 IEEE.
Topics
TNO Identifier
461397
ISBN
9781424492886
Article nr.
No.: 6126964
Source title
10th IEEE SENSORS Conference 2011, SENSORS 2011, 28 October 2011 through 31 October 2011, Limerick, Ireland
Collation
3 p.
Pages
585-587
Files
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