4 September 2015 A paper-based all organic ion sensor
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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.
© (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Johannes Kofler, Johannes Kofler, Sebastian Nau, Sebastian Nau, Emil J. W. List-Kratochvil, Emil J. W. List-Kratochvil, } "A paper-based all organic ion sensor", Proc. SPIE 9568, Organic Field-Effect Transistors XIV; and Organic Sensors and Bioelectronics VIII, 95681L (4 September 2015); doi: 10.1117/12.2187546; https://doi.org/10.1117/12.2187546
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