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.File | Dimensione | Formato | |
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Sprayed Graphene Transistors.pdf
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A Sprayed Graphene Transistor Platform for Rapid and Low-Cost Chemical Sensing.pdf
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