Electrochemical Capacitive K + EMIS Chemical Sensor Based on the Dibromoaza[7]helicene as an Ionophore for Potassium Ions Detection

Abstract : A K+-sensitive capacitive electrolyte-membrane-insulator-semiconductor (EMIS) based on a novel dibromoaza[7]helicene ionophore has been developed. An ion-sensitive membrane based on polyvinylchloride (PVC) doped with the ionophore was deposited on the Si3N4/SiO2/Si-p/Cu-Al transducer. The properties of the K+-EMIS chemical sensor were investigated by electrochemical impedance spectroscopy (EIS). All the developed devices upon being tested have shown good sensitivity and linearity responses within the range 10(-6) M to 10(-1) M of potassium activity, with good selectivity over a wide variety of other cations (Na+, Li+, Cu2+, Ca2+, and Mg2+). To our knowledge, this is the first time that a capacitive field-effect sensor has been fabricated using helicene as a carrier for K+-detection, combined with the structure: Si3N4/SiO2/Si-p/Cu-Al as a transducer.
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Electroanalysis, Wiley-VCH Verlag, 2016, 28 (12), pp.2892-2899. 〈10.1002/elan.201600104〉
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Contributeur : Agnès Bussy <>
Soumis le : samedi 24 juin 2017 - 19:02:56
Dernière modification le : mercredi 12 septembre 2018 - 10:04:03

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Moncef Tounsi, Mourad Ben Braiek, Abdoullatif Baraket, Michael Lee, Nadia Zine, et al.. Electrochemical Capacitive K + EMIS Chemical Sensor Based on the Dibromoaza[7]helicene as an Ionophore for Potassium Ions Detection. Electroanalysis, Wiley-VCH Verlag, 2016, 28 (12), pp.2892-2899. 〈10.1002/elan.201600104〉. 〈hal-01546558〉

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