Preparation Of Planar Ion-Selective Electrode Based On Conjugated Thiophene Oligomer

Ion-selective electrodes (ISEs) are the most common electrochemical sensors in environmental and clinical analysis. However, many challenges still remain to reduce the size and cost of the electrodes for a larger scale application. In this study, a novel planar ion-selective electrode using alpha, omega-dihexylsexithiophene (DH6T) as the ion-to-electron transducer was developed with small size and low cost. The new electrode exhibited a response of 29.7 mV/dec and a low detection limit of 7.2x10(-8) mol/L. Moreover, the fabricated planar electrode has wide linear range, quick response and enhanced stability.