Fig. 1

Working micromechanism of MXene-material for piezoresistive sensor. a The distances between two neighboring interlayers of the MXenes in the sensor decrease under an external pressure. The wider distance (D w) between two interlayers is easier to be compressed, while the narrower distance (D n) between two lattices has a smaller compress ratio. b The equivalent circuit diagram of MXene-based piezoresistive sensor, where the total resistance falls due to the distance decrease