fig6

Figure 6. Demonstration of PCM organohydrogel wearable strain sensors for monitoring human activities. (A) Repetitive sensing signals during speaking. ΔR/R₀ of the PCM organohydrogel in response to finger bending at (B) low temperature and (C) high temperature environments; (D) Knee bending signal detection using the initial and healed PCM organohydrogel sensors; (E and F) Applications of the PCM organohydrogel in Morse code transmission. EMG signals recording from the (G) bicep and (H) forearm using the PCM organohydrogel; (I) Interfacial impedance comparison of the PCM organohydrogel electrodes and commercial gel electrodes; (J) EMG signals and SNR measured by PCM organohydrogel electrodes and commercial hydrogel electrodes; (K) Characteristic EMG signals corresponding to specific gestures; (L) EMG signals from the calf muscle area during jumping; Informed signed consent was obtained from the volunteer for the human biosignal detection experiments. PCM: PAM/CS/MXene; EMG: electromyography; SNR: signal-to-noise ratio.