Electrochemical Capacitive K+ EMIS Chemical Sensor Based on the Dibromoaza[7]helicene as an Ionophore for Potassium Ions Detection. Issue 12 (27th June 2016)

• Record Type: Journal Article
• Authors: Tounsi, Moncef; Ben Braiek, Mourad; Baraket, Abdoullatif; Lee, Michael; Zine, Nadia; Zabala, Miguel; Bausells, Joan; Aloui, Faouzi; Ben Hassine, Béchir; Maaref, Abderrazak; Errachid, Abdelhamid
• Is Part Of: Electroanalysis. Volume 28:Issue 12(2016)
• Page Start: 2892
• Page End: 2899
• Publication Date: 2016-06-27
• Subjects: Capacitive field-effect chemical sensor -- dibromoaza[7]helicene -- potassium sensitivity -- electrochemical impedance spectroscopy -- silicon nitride; Electrochemical analysis -- Periodicals; Chemistry, Analytical -- Periodicals; Electrochemistry -- Periodicals; 543.4
• DOI: 10.1002/elan.201600104
• Languages: English
• ISSNs: 1040-0397

Abstract

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 Si3 N4 /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 +, Cu 2+, Ca 2+, and Mg 2+ ). 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: Si3 N4 /SiO2 /Si‐p/Cu‐Al as a transducer. Abstract :