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Zhang et al. Soft Sci. 2025, 5, 17 https://dx.doi.org/10.20517/ss.2024.68 Page 7 of 13

Figure 3. Sensing performance of the sensor. (A) Schematic diagram illustrating the conductive MXene-based fabric piezoresistive
sensing mechanism and corresponding equivalent circuit; (B) I-V curves under different pressures; (C) Relative current change curve
upon pressure; (D) Comparison of the sensitivity and detection range between our sensor and previously reported ones; (E) Response
and recovery time. Dynamic behavior (F) under escalating pressures and (G) different frequencies.

and thus decreased internal resistance. Meanwhile, the effective contact area between the sensitive layer and
the two electrodes also correspondingly increases upon the applied pressure, causing the contact resistances
to decrease. Compared with a conventional solid sensitive layer with no internal microstructures, the highly
porous structure of the sensitive layer can provide a prominent resistance change during the compression
process. Additionally, the loose contacting state between the porous sensitive layer and the electrodes
ensures a very small initial resistance value with no pressure applied. Therefore, the relative resistance
change value by dividing the resistance change with the initial resistance is huge, facilitating the
achievement of a very high sensitivity.