Issue 7, 2023

A sprayed graphene transistor platform for rapid and low-cost chemical sensing

Abstract

We demonstrate a novel and versatile sensing platform, based on electrolyte-gated graphene field-effect transistors, for easy, low-cost and scalable production of chemical sensor test strips. The Lab-on-PCB platform is enabled by low-boiling, low-surface-tension sprayable graphene ink deposited on a substrate manufactured using a commercial printed circuit board process. We demonstrate the versatility of the platform by sensing pH and Na+ concentrations in an aqueous solution, achieving a sensitivity of 143 ± 4 μA per pH and 131 ± 5 μA per log10Na+, respectively, in line with state-of-the-art graphene chemical sensing performance.

Graphical abstract: A sprayed graphene transistor platform for rapid and low-cost chemical sensing

Supplementary files

Article information

Article type
Paper
Submitted
21 okt 2022
Accepted
19 jan 2023
First published
24 jan 2023
This article is Open Access
Creative Commons BY license

Nanoscale, 2023,15, 3243-3254

A sprayed graphene transistor platform for rapid and low-cost chemical sensing

B. Fenech-Salerno, M. Holicky, C. Yao, A. E. G. Cass and F. Torrisi, Nanoscale, 2023, 15, 3243 DOI: 10.1039/D2NR05838C

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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