Fig. 7.

Pressure sensors with high sensitivity. a Schematic diagram, comparison of compression simulation and sensing performance of graded intrafillable microstructured ultra-capacitive pressure sensor [75]. Copyright (2020) The Authors. b PPy/PDMS stamps with millimeter/micro/nanostructures [76]. Copyright (2020) Wiley–VCH. c Negative Poisson's ratio structure with more contact under compression [77]. Copyright (2022) Elsevier. d Pressure sensor based on spongy skeleton combined with sea-urchin shape particles (SUSP). e TEM image and f high-resolution TEM image of heterogeneous interface in SUSP [78]. Copyright (2021) The Authors