▎ 摘　　要

Recently, the macroporous and free-shaped reduced graphene oxide paper (MFGP) has been considered a sensing medium due to its ultralightweight, flexibility and good electrical conductivity performance. Here, a highly sensitive MFGP-based strain and pressure sensor is fabricated based on the macroporous reduced graphene oxide (rGO) paper. The honeycomb-like macroporous structure was obtained using a confined space to constrain the expansion paper to a certain thickness. Due to the interlock and layer-by-layer macroporous structure, the strain and pressure sensor has an ultrahigh gauge factor of 143 in the strain range of 7.6-11% and 1.5 kPa(-1) in the pressure range of 0-60 kPa. Moreover, the MFGP-based strain and pressure sensor can monitor human motions such as wrist pulse, speaking and tiny muscle movements with a very low operating voltage of 5 mV. Therefore, the high sensitivity, flexibility, low operating voltage and free-shaped of the MFGP-based strain and pressure sensors demonstrate potential applications as wearable devices.