fig1

Figure 1. Self-powered wearable sensors used in various parts of the human body. They are EEG. Reproduced with permission^[40]. Copyright 2015, IOP Publishing Ltd; Breath. Reproduced with permission^[41]. Copyright 2019, Elsevier Ltd; ECG. Reproduced with permission^[42]. Copyright 2018, American Chemical Society; Feet. Reproduced with permission^[43], Copyright 2022, Advanced Materials Technologies; Eyes, Reproduced with permission^[44], Copyright 2018, Elsevier Ltd; Sweat, Reproduced with permission^[45], Copyright 2022, Elsevier Ltd; Pulses, Reproduced with permission^[46] Copyright 2022, Licensee MDPI, Basel, Switzerland; Legs, Reproduced with permission^[47] Copyright 2022, American Chemical Society. ECG: Electrocardiogram; EEG: electroencephalogram.