Integrated pH Sensors Based on RuO 2 /GO Nanocomposites Fabricated Using the Aerosol Jet Printing Method.

Autor: Taheri M; Electrical and Computer Engineering (ECE) Department, McMaster University, 1280 Main Street W, Hamilton, Ontario L8S4K1, Canada., Ketabi M; Department of Electrical Engineering, École de Technologie Supérieure, Montreal, Quebec H3C 1K3 Canada., Al Shboul AM; Department of Electrical Engineering, École de Technologie Supérieure, Montreal, Quebec H3C 1K3 Canada., Mahinnezhad S; Department of Electrical Engineering, École de Technologie Supérieure, Montreal, Quebec H3C 1K3 Canada., Izquierdo R; Department of Electrical Engineering, École de Technologie Supérieure, Montreal, Quebec H3C 1K3 Canada., Deen MJ; Electrical and Computer Engineering (ECE) Department, McMaster University, 1280 Main Street W, Hamilton, Ontario L8S4K1, Canada.; School of Biomedical Engineering, McMaster University, 1280 Main Street W, Hamilton, Ontario L8S4K1, Canada.
Jazyk: angličtina
Zdroj: ACS omega [ACS Omega] 2023 Nov 29; Vol. 8 (49), pp. 46794-46803. Date of Electronic Publication: 2023 Nov 29 (Print Publication: 2023).
DOI: 10.1021/acsomega.3c06309
Abstrakt: An aerosol jet printing (AJP) process for depositing ruthenium dioxide (RuO 2 ) as a promising material for pH sensing is reported. Graphene oxide (GO) with a large surface area was used for the in situ sol-gel deposition of RuO 2 nanoparticles on its surface. The cosolvent ratio and solid loading of the solution are adjusted to form a printable and stable ink. The monodispersed aerosol was atomized on the surface of the screen-printed carbon electrode in order to develop an integrated pH sensor. The RuO 2 -GO pH sensor demonstrates excellent performance, with a rapid response time of less than 5 s and high sensitivity in the pH range of 4-10. Compared to traditional carbon electrodes, the RuO 2 -GO sensor shows up to four times higher sensitivity. The increased sensitivity is a result of the consistent attachment of small-crystallized RuO 2 nanoparticles onto the surface of GO sheets, leading to a synergistic effect. Thanks to the AJP method as a facile and cost-effective integration technique, the fabricated electrodes can serve as an alternative to traditional rigid pH electrodes for accurate pH measurement.
Competing Interests: The authors declare no competing financial interest.
(© 2023 The Authors. Published by American Chemical Society.)
Databáze: MEDLINE
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