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. 2022 Oct 27;12(11):936. doi: 10.3390/bios12110936

Figure 6.

Figure 6

Several powered devices for wearable sensors based on 2D materials. (A): (i) Electrical signals generated by flexible piezoelectric nanogenerators when bent. (ii) The output voltage, current, and instantaneous power outputs dependence on different load resistance ranges [133]. Copyright 2021, Wiley-VCH. (B): (i) General schematic diagram of a thermogenerator self-powered wearable ECG system. (ii) System open-circuit voltage versus operating time variation [134]. Copyright 2018, American Chemical Society. (C): V–Q curves of a TENG under different loads. Illustration is photograph of using the integrated KP-SC (6 units; 3 devices in series) to light up a single commercial green LED under cycling stretching movement [135]. Copyright 2016, American Chemical Society. (D): Working of a glucose biofuel cell contact lens sensor, schematic diagram [136]. Copyright 2013, American Chemical Society. (E): (i) Optical image of an organic photovoltaic flexible assembly module. (ii) J–V curves of flexible photovoltaics of different areas [137]. Copyright 2021, Wiley-VCH.