fig2

Figure 2. Pressure sensing performance enabled by the structure–resistance dual-gradient design. (A) Schematic illustration of the aerosol jet printing process used to fabricate dual-gradient stripes; (B) Equivalent electric circuit and schematics showing the strategy for achieving linearity; (C) Comparison of pressure responses with different gradient configurations; (D) Electrical characterization of printing inks with different MXene/HEC ratios; (E) The macroscopic surface morphology of the printed MXene film; (F) Pressure response of the dual-gradient patterned module with linear fitting; (G) Step response under low-pressure stimuli indicating the detection limit; (H) Dynamic response and recovery behavior of the pressure-sensing module; (I) Compression-release pressure response curves of the pressure module; (J) Stability test of the pressure module under more than 20,000 compression–release cycles. HEC: Hydroxyethyl cellulose; GF: gauge factor.