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Open AccessArticle

Indirect Sensing of Lower Aliphatic Ester Using Atomic Gold Decorated Polyaniline Electrode

1
Department of Information and Communications Engineering, Tokyo Institute of Technology, Kanagawa 226-8503, Japan
2
Department of Material Science and Engineering, Tokyo Institute of Technology, Kanagawa 226-8503, Japan
3
Institute of Innovative Research (IIR), Tokyo Institute of Technology, Kanagawa 226-8503 Japan
4
Laboratory for Future Interdisciplinary Research of Science and Technology, Institute of Innovative Research, Tokyo Institute of Technology, Kanagawa 226-8503, Japan
*
Author to whom correspondence should be addressed.
Sensors 2020, 20(13), 3640; https://doi.org/10.3390/s20133640
Received: 20 May 2020 / Revised: 15 June 2020 / Accepted: 25 June 2020 / Published: 29 June 2020
(This article belongs to the Special Issue Machine Olfaction and Taste)
Novel sensing materials have been formed by decorating polyaniline conducting polymers with atomic gold clusters where the number of atoms is precisely defined. Such materials exhibit unique electrocatalytic properties of electrooxidation to aliphatic alcohols, although analytes with other functional groups have not been studied. This paper reports a study of cyclic voltammetric patterns obtained with bi-atomic gold nanocomposite response to analytes with other functional groups for sensor applications. Principal component analysis shows separation among normal-propanol, iso-propanol and ethyl formate/ethanol groups. Indirect sensing of ethyl formate is demonstrated by electrooxidation of the product upon hydrolysis in alkaline medium. Voltammograms of ethyl formate are studied in gaseous phases. View Full-Text
Keywords: amperometric gas sensor; bi-atomic gold; ethyl formate; polyaniline; principal component analysis amperometric gas sensor; bi-atomic gold; ethyl formate; polyaniline; principal component analysis
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Chakraborty, P.; Chien, Y.-A.; Chang, T.-F.M.; Sone, M.; Nakamoto, T. Indirect Sensing of Lower Aliphatic Ester Using Atomic Gold Decorated Polyaniline Electrode. Sensors 2020, 20, 3640.

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