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Issue 21, 2012
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A simultaneous voltammetric temperature and humidity sensor

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We report the simultaneous measurement of temperature and humidity by analysing square wave voltammetric responses of two ferrocene derivatives, decamethylferrocene (DmFc) and 1,2-diferrocenylethylene (bisferrocene, BisFc) in 1-(2-methoxyethyl)-1-methyl-pyrrolidinium tris(pentafluoroethyl)trifluorophosphate ([Moepyrr][FAP]). These two molecules produce three peaks in square wave voltammetry. Through study of the peak potentials of BisFc/BisFc+ (vs. DmFc/DmFc+) and BisFc+/BisFc2+ (vs. DmFc/DmFc+) over a temperature range of 298 K to 318 K and humidity range of 1% to 50% using square wave voltammetry, the temperature and humidity dependences of the relative peak potentials were investigated. A reliable method to calculate the humidity and temperature based on the voltammetric experiment is characterised and demonstrated.

Graphical abstract: A simultaneous voltammetric temperature and humidity sensor

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Publication details

The article was received on 10 Jul 2012, accepted on 12 Sep 2012 and first published on 13 Sep 2012

Article type: Paper
DOI: 10.1039/C2AN35939A
Citation: Analyst, 2012,137, 4951-4957
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    A simultaneous voltammetric temperature and humidity sensor

    L. Xiong, A. M. Fletcher, S. G. Davies, S. E. Norman, C. Hardacre and R. G. Compton, Analyst, 2012, 137, 4951
    DOI: 10.1039/C2AN35939A

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