fig9

Figure 9. Biochemical sensors. (A) Schematic of the PANI-based hierarchically designed nanocomposite (left) and current level according to the concentration of glucose (right). Reproduced with permission from ref^[196]. Copyright 2021, Elsevier Ltd; (B) Schematic of the Ni-Co MOF nanosheet coated rGO/PU fiber (left) and the glucose sensor integrated into the elastic fabric (middle). Measured glucose content in sweat by the wearable sensor for one day (right). Reproduced with permission from ref^[197]. Copyright 2021, American Chemical Society; (C) Image and mechanism of the CMP-based biochemical sensor (left). Current level according to the concentration of lactate (right). Reproduced with permission from ref^[154]. Copyright 2022, Wiley-VCH GmbH; (D) Schematic illustration and SEM image of the Au/SWCNT/AuNPs composite (left). Voltage level according to the concentration of sodium before and after 500 bending cycles (right). Reproduced with permission from ref^[199]. Copyright 2021, Elsevier B.V. AuNPs: Gold nanoparticles; CE: counter electrode; CMP: Pt-decorated CNT; CNT: carbon nanotube; MOF: metal-organic framework; PANI: polyaniline; PU: polyurethane; PVA: poly(vinyl alcohol); RE: reference electrode; rGO: reduced graphene oxide; SWCNT: multi-walled carbon nanotube; TEGO: thermally-exfoliated GO; WE: working electrode.