Fig. 2: Structure and design concept of the pressure sensor.

a Schematic illustration of the structure of pressure sensor arrays. b SEM images of prslPDMS layer with different resolutions, which could reach 100 μm; the right photographs demonstrate the patterns on various substrates (top: glass, bottom: silicon wafer), indicating its good adaptability. c Tensile properties (left) and UV-visible spectra (right) of prslPDMS exhibit the excellent stretchability and transparency. d Schematic showing the design concept for the ultralow crosstalk sensor, where the prslPDMS layer perform the effect of strain local confinement for mechanical stability as well as multilayer device. Optical photographs of sensor arrays attached on palm no matter in the flat (e) or curly (f) state, which achieve the transparency of 50.36% and thickness of 60.59 μm.