Extended Data Fig. 10: Four-layer integrated circuit.
From: A three-dimensional liquid diode for soft, integrated permeable electronics

a, Exploded schematic illustrating the layer-by-layer structure. b, Photographic image of the integrated circuit. Scale bar, 1 cm. c,d, Images of the permeable device affixed to the chest (c) and forearm (d) for ECG (c) and EMG (d) signal acquisition, alongside the recorded ECG (c) and EMG (d) traces. Scale bars, 6 cm.