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Integrated pH sensors based on RuO2/GO Nanocomposites fabricated using the aerosol jet printing method

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Taheri, Mahtab, Ketabi, Mohsen, Al Shboul, Ahmad M., Mahinnezhad, Shirin, Izquierdo, Ricardo and Deen, M. Jamal. 2023. « Integrated pH sensors based on RuO2/GO Nanocomposites fabricated using the aerosol jet printing method ». ACS Omega, vol. 8, nº 49. pp. 46794-46803.

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Abstract

An aerosol jet printing (AJP) process for depositing ruthenium dioxide (RuO2) 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 RuO2 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 RuO2−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 RuO2−GO sensor shows up to four times higher sensitivity. The increased sensitivity is a result of the consistent attachment of small-crystallized RuO2 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.

Item Type: Peer reviewed article published in a journal
Professor:
Professor
Izquierdo, Ricardo
Affiliation: Génie électrique
Date Deposited: 04 Jan 2024 20:36
Last Modified: 08 Jan 2024 20:10
URI: https://espace2.etsmtl.ca/id/eprint/28255

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