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Potentiometric RuO2–Ta2O5 pH sensors fabricated using thick film and LTCC technologies

Manjakkal, Libu; Zaraska, Krzysztof; Cvejin, Katarina; Kulawik, Jan; Szwagierczak, Dorota

Authors

Krzysztof Zaraska

Katarina Cvejin

Jan Kulawik

Dorota Szwagierczak



Abstract

The paper reports on the preparation, properties and application of potentiometric pH sensors with thick film RuO2–Ta2O5 sensing electrode and Ag/AgCl/KCl reference electrode screen printed on an alumina substrate. Furthermore, it presents fabrication procedure and characterization of a new miniaturized pH sensor on LTCC (low temperature cofired ceramics) substrate, destined for wireless monitoring. The crystal structure, phase and elemental composition, and microstructure of the films were investigated by X-ray diffractometry, Raman spectroscopy, scanning electron microscopy and energy dispersive spectroscopy. Potentiometric characterization was performed in a wide pH range of 2–12 for different storage conditions and pH loops. The advantages of the proposed thick film pH sensors are: (a) low cost and easy fabrication, (b) excellent sensitivity close to the Nernstian response (56 mV/pH) in the wide pH range, (c) fast response, (d) long lifetime, (e) good reproducibility, (f) low hysteresis and drift effects, and (g) low cross-sensitivity towards Li+, Na+ and K+ as interfering ions. The applicability of the sensors for pH measurement of river, tap and distilled water, and some drinks was also tested.

Citation

Manjakkal, L., Zaraska, K., Cvejin, K., Kulawik, J., & Szwagierczak, D. (2016). Potentiometric RuO2–Ta2O5 pH sensors fabricated using thick film and LTCC technologies. Talanta, 147, 233-240. https://doi.org/10.1016/j.talanta.2015.09.069

Journal Article Type Article
Acceptance Date Sep 25, 2015
Online Publication Date Oct 13, 2015
Publication Date 2016-01
Deposit Date Jul 20, 2022
Journal Talanta
Print ISSN 0039-9140
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 147
Pages 233-240
DOI https://doi.org/10.1016/j.talanta.2015.09.069
Keywords Analytical Chemistry
Public URL http://researchrepository.napier.ac.uk/Output/2891001