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. 2021 May 4;13:122. doi: 10.1007/s40820-021-00615-5

Fig. 2.

Fig. 2

Optimization of stretchability and linearity of the sensor. a Relative resistance changes in T-direction of bilayer sensors with different area ratios of top to bottom films: schematics of the corresponding structures in inset. Morphologies of bilayer sensors when loaded at b 5% and c 50% strains in T-direction. d Schematic illustration of stepwise crack propagation mechanism