Electrochemical Capacitive K super(+) EMIS Chemical Sensor Based on the Dibromoaza[7]helicene as an Ionophore for Potassium Ions Detection
A K super(+)-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 Si sub(3)N sub(4)/SiO sub(2 )/Si-p/Cu-Al...
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Veröffentlicht in: | Electroanalysis (New York, N.Y.) N.Y.), 2016-12, Vol.28 (12), p.2892-2899 |
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Sprache: | eng |
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Zusammenfassung: | A K super(+)-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 Si sub(3)N sub(4)/SiO sub(2 )/Si-p/Cu-Al transducer. The properties of the K super(+)-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 super(-6) M to 10 super(-1) M of potassium activity, with good selectivity over a wide variety of other cations (Na super(+), Li super(+), Cu super(2+), Ca super(2+), and Mg super(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 super(+)-detection, combined with the structure: Si sub(3)N sub(4)/SiO sub(2 )/Si-p/Cu-Al as a transducer. |
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ISSN: | 1040-0397 1521-4109 |
DOI: | 10.1002/elan.201600104 |