A Flexible Piezoresistive Sponge Sensor with a Dual-Scale Porous Structure for Ultra-Wide-Range and High-Sensitivity Pressure Detection

= 99.81%), and outstanding durability (4100 cycles at 1 MPa with only 5% degradation in current variation). The MC/MP sponge sensor demonstrated remarkable multimodal sensing capabilities, spanning from subtle physiological signals (Pa-level) to extreme mechanical stresses caused by automobile rear wheels (MPa-level). Human-machine interaction system composed of five flexible piezoresistive sponge sensors and a robotic hand is also developed, and real-time manipulation of the robotic hand gesture is achieved by manually pressing the sensor array. We think the dual-scale structure not only provides a universal design strategy for overcoming the sensitivity-detection range trade-off in flexible piezoresistive sensors and redefining their capabilities but also highlights their immense potential for applications in human-motion monitoring and interactive human-machine systems.