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Proceedings Paper

A paper-based all organic ion sensor
Author(s): Johannes Kofler; Sebastian Nau; Emil J. W. List-Kratochvil
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Paper Abstract

Using a so called pulsetrode concept and two identical ion selective electrodes (ISEs), the concentration of alkali metal ions can be measured without using a reference electrode. This measurement method was demonstrated recently, using all organic ISEs which have been fabricated by simplest means on a plain sheet of paper. Though, this low-cost, all organic ion sensing platform exhibited excellent stability over three months, it required a time consuming conditioning prior to measurement (>1 h). Here, we present a new measurement method which employs a square wave current rather than a single current pulse which is followed by a long regeneration time. This method reduces the conditioning time to 6 minutes, using the same low-cost sensing platform. Furthermore, after the initial conditioning, a quasi continuous measurement is possible. Additionally, using ISEs with different surface areas, a low-cost and simple threshold sensor is demonstrated.

Paper Details

Date Published: 4 September 2015
PDF: 8 pages
Proc. SPIE 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII, 95681L (4 September 2015); doi: 10.1117/12.2187546
Show Author Affiliations
Johannes Kofler, NanoTecCenter Weiz Forschungsgesellschaft mbH (Austria)
Sebastian Nau, NanoTecCenter Weiz Forschungsgesellschaft mbH (Austria)
Emil J. W. List-Kratochvil, NanoTecCenter Weiz Forschungsgesellschaft mbH (Austria)
Graz Univ. of Technology (Austria)

Published in SPIE Proceedings Vol. 9568:
Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII
Ioannis Kymissis; Iain McCulloch; Ruth Shinar; Oana D. Jurchescu; Luisa Torsi, Editor(s)

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