Fig. 1.

Skin-inspired highly stretchable and conformable matrix networks. a Schematic illustration of SCMNs conforming to the surface of a human arm and an expanded network (expansion: 200%) conforming to the surface of a human abdomen (right); the tree branch-like connections of neurons (left bottom); the sensory receptors of the glabrous skin (left top). b Optical image of the fabricated polyimide network (10 × 10 array, scale bar: 5 mm). c Tilted SEM image of the polyimide network (scale bar: 500 μm); the inset is a higher resolution SEM image of a meandering interconnect (scale bar: 50 μm). d Schematic layout of an SCMN—an integrated sensor array with eight functions. (temp.: temperature). e Image of an SCMN attached to a sheet of paper, demonstrating ultrahigh flexibility and stretchability. The inset (upper) shows an SCMN conforming to a human finger, (middle) an SCMN attached to human skin with compression, and (bottom) an SCMN stretched by a human hand (scale bar: 1 cm)