Fig. 3
The response of the MXene-based sensor to pressures. a The I–T curves under the pressures below 13 kPa. The current monotonically increases with the pressure. b The linear relation of the I–V curves suggests the ohmic contacts between MXene and interdigital electrodes. c The ∆R/R off first undergoes a sharp increase as function of pressure below 5 kPa, then a small increase above 5 kPa. Here, the SD for the data is in the range of 1.44–8.21%, which is shown by the error bars and calculated by analyzing five sets of data under each pressure. d The ∆R/R off vs strain. The highest GF, 180.1 was obtained. Here, the SD for the data is in the range of 0.26–1.78%, which is shown by the error bars and calculated by analyzing four sets of data under each strain value. e I–T relation under various bending angles. f An amplifying I–T curve part exhibiting a fast responsive time <30 ms. g Both the output current and external pressure on time kept well in step with the loading and unloading. h The resistivity change ratio ∆R/R off keeps a good stability
