Miniature electrochemical sensors (ES) can be used for rapid, sensitive, and low-cost detection of pollutants in water. The ES, consisting of a graphite-glass working electrode (WE) and platinum as counter and quasi-reference electrode as well as electrical contacts, was integrated on an alumina substrate. The electrical contacts were protected by temperature- or UV-curing polymers to prevent contact with water during the measurements. In this study, the effect of polymer treatment at 150 °C for 2 h in air or UV curing for 10 min on the electrochemical performance of the ES with a graphite-based WE is investigated. The WE thickness, roughness, and sheet resistance were not affected by the polymer treatment. Cyclic voltammetry measurements in the hexacyanoferrate (II)/(III) redox probe showed that although all sensors exhibited good electrochemical reversibility, the polymer treatments resulted in reduced electrochemically active surface area and electron transfer rate. The ES response is renewed and improved through linear scan voltammetry over a potential range of 0.0 V to −2.5 V.
Track ID:
2
Track Name:
ICE - International Conference on Electroceramics
Secondary Track ID:
2.3
Secondary Track Name:
Ice: Electroceramics Inspired By Energy Applications
