Graded intrafillable architecture-based iontronic pressure sensor with ultra-broad-range high sensitivity

Abstract Sensitivity is a crucial parameter for flexible pressure sensors and electronic skins. While introducing microstructures (e.g., micro-pyramids) can effectively improve the sensitivity, it in turn leads to a limited pressure-response range due to the poor structural compressibility. Here, we report a strategy of engineering intrafillable microstructures that can significantly boost the sensitivity while simultaneously broadening the pressure responding range. Such intrafillable microstructures feature undercuts and grooves that accommodate deformed surface microstructures, effectively enhancing the structural compressibility and the pressure-response range. The intrafillable iontronic sensor exhibits…

• NN
  National Natural Science Foundation of China

  Awards: 2016ZT06G587, 51771089, U1613204
• SU
  Southern University of Science and Technology