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Figure 10. Optical-involved multimodal flexible sensors. (A) The principle of photothermoelectric effect conversion; (B) The response of the device to near-infrared light. Reproduced with permission^[112]. Copyright 2024, Elsevier; (C) Nanocomposites manufacturing process. Reproduced with permission^[116]. Copyright 2022, Nature; (D) Multifunctional fiber and textile manufacturing processes. Reproduced with permission^[117]. Copyright 2019, Wiley. KM₁₅G₈H_0.5Ca₅ gel: The hydrogel formed by calcium chloride cross-linked gellan gum as the first network, poly(N-hydroxyethyl acrylate) as the second network, and 3-(trimethoxysilyl)propyl methacrylate -modified MXene nanosheets; TOCNFs: TEMPO (2,2,6,6-tetramethylpiperidine-1-oxylradi-cal)-mediated oxidized cellulose nanofibrils; PDMS: polydimethylsiloxane; PU: polyurethane; PM: MXene is assembled to the PU surface; PMP: PDMS are assembled to the PM surface; PMPP: the dopamine is covered over the PMP.