Fig. 1: Design and the sensing mechanism of the DPyCF@SR pressure sensor.

a Exploded view illustrating the design layout of the DPyCF@SR sensor. b Schematics showing the strategy for achieving high sensitivity and wide linear range together. The synergy between the nonlinear elasticity of the SR and the nonlinear piezoresistivity of the DPyCF@SR results in the high linearity of the sensor. c Relative current change as a function of pressure ranging from 0 to 1400 kPa as measured from one DPyCF@SR sensor. S: sensitivity, LSR: linear sensing range (n = 3 samples; center, mean; error bars, s.d.). d Comparison of the performance between our DPyCF@SR pressure sensor and those reported in the literatures. LSF: linear sensing factor. e Numerically calculated linearity of the DPyCF@SR sensors with different combinations of decay constant (α) and stiffening constant (β).