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 sensitivity of 143 ± 4 μA/pH and 131.4 ± 5 μA/log10Na+, respectively, in line with state-of-the-art graphene chemical sensing performance.

A Sprayed Graphene Transistor Platform for Rapid and Low-Cost Chemical Sensing

Felice Torrisi
2023-01-01

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 sensitivity of 143 ± 4 μA/pH and 131.4 ± 5 μA/log10Na+, respectively, in line with state-of-the-art graphene chemical sensing performance.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11769/547041
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