Effect of ordered mesoporous carbon contact layer on the sensing performance of sputtered RuO2 thin film pH sensor

Authors/Creators

Wade Lonsdale, Edith Cowan UniversityFollow
Devendra Maurya, Edith Cowan UniversityFollow
Magdalena Wajrak, Edith Cowan UniversityFollow
Kamal Alameh, Edith Cowan UniversityFollow

Abstract

The effect of contact layer on the pH sensing performance of a sputtered RuO₂ thin film pH sensor is investigated. The response of pH sensors employing RuO₂ thin film electrodes on screen-printed Pt, carbon and ordered mesoporous carbon (OMC) contact layers are measured over a pH range from 4 to 10. Working electrodes with OMC contact layer are found to have Nernstian pH sensitivity (−58.4 mV/pH), low short-term drift rate (5.0 mV/h), low hysteresis values (1.13 mV) and fast reaction times (30 s), after only 1 h of conditioning. A pH sensor constructed with OMC carbon contact layer displays improved sensing performance compared to Pt and carbon-based counterparts, making this electrode more attractive for applications requiring highly-accurate pH sensing with reduced conditioning time.

RAS ID

22862

Document Type

Journal Article

Date of Publication

2017

School

School of Science / Electron Science Research Institute

Copyright

subscription content

Publisher

Elsevier

Related Publications

Lonsdale, W. (2018). Development, manufacture and application of a solid-state pH sensor using ruthenium oxide. Retrieved from http://ro.ecu.edu.au/theses/2095

Comments

Lonsdale,W. ,Maurya,D. ,Wajrak,M. ,Alameh,K.(2017). Effect of ordered mesoporous carbon contact layer on the sensing performance of sputtered RuO2 thin film pH sensor. Talanta,164(1), 52 - 56. https://doi.org/10.1016/j.talanta.2016.11.020

Recommended Citation

Lonsdale, W., Maurya, D., Wajrak, M., & Alameh, K. (2017). Effect of ordered mesoporous carbon contact layer on the sensing performance of sputtered RuO2 thin film pH sensor. DOI: https://doi.org/10.1016/j.talanta.2016.11.020