Abstract
In this work, a cost-effective, flexible, and fully printable potassium ion (K+) sensor is developed. The sensor consists of two interdigitated gold electrodes covered by a butylacrylate potassium ion-sensitive membrane (ISM). An impedimetric measurement method is chosen to eliminate the need for a reference electrode and to reduce signal drifting. We show the versatility and high reproducibility of the manufacturing process and present first measurement results. Our sensors achieve a sensitivity of 4.553 MOhm/(mmol/L) at 100 mHz and an accuracy of 1.8 mmol/L. The sensors exhibit low cross-sensitivity towards sodium ions and show no signal drift.
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