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. 2021 Aug 5;129:112356. doi: 10.1016/j.msec.2021.112356

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Fig. 14 — Schematic illustration of (a-b) graphene engraved electrochemical sensor platform for multiplex sensing of SARS-CoV-2 markers such as proteins from SARS-CoV-2, IgM and IgG antibodies and CRP as an inflammatory biomarker in blood and saliva. (c-f) Image of a flexible and disposable laser engraved graphene electrochemical sensor that can be interfaced with a PCB for processing signal reading and a mobile user interface to receive results via wireless transmission [186].