fig5

Figure 5. (A) Self-powered application demonstration, deployment location, and operating principle of E-skin for health monitoring. Some image elements designed by Freepik (https://www.freepik.com/); (B) A photo of seamlessly integrated E-skin. The hollow design in the middle facilitates conformal fit near the nose; (C) Nose-breathing humidity response curve at different breathing frequencies; (D) Humidity sensing applications related to the use of disposable gloves; (E) Relationship between the time that an ungloved finger stays near the sensor and the current; (F) Changes in the relative currents of the sensors near the dry and wet fingers with or without gloves; (G) Photographs of the time-sequential dissolution of MXene-based interdigital electrodes immersed in PBS (0.1 M, pH 7.4) at 85 °C. Schematic of the corresponding degradation mechanism. E-skin: Electronic skin; PBS: phosphate-buffered saline; MSCs: micro-supercapacitors.