fig4

Figure 4. ECG measurement for low-motion artifacts by the nanomesh electrode under variable conditions. (A) Schematic illustration of the three-electrode configuration for ECG measurement, with nanomesh electrodes positioned on the LA and RL as recording electrodes and on the RA as the ground electrode; (B) Comparative ECG signals recorded by nanomesh electrode (red) and commercial gel electrode (black) at rest state; (C) ECG signals measured by nanomesh electrode under various conditions, including wet, skin stretching, and forearm waving action; (D) Corresponding SNR values of ECG signals under various conditions; (E) Comparison of ECG signals before and after 20-min exercise; (F) Scatter plot of R-R intervals derived from ECG signals before and after exercise. ECG: Electrocardiography; LA: left arm; RL: right leg; RA: right arm; SNR: signal-to-noise ratio.