Fig. 5. Schematic illustration of o-PP derivatives as mechanical potentiometers based on STM-BJ measurement.

a The one-dimensional histograms for o-PP-2SMe without data selection and with data selection among different conductance range in THF: TMB (1:4, v/v), along with the values of the conductance peaks labeled beside the fitting curves. b Typical “downhill” conductance–displacement traces for o-PP-2SMe and the schematic illustration of mechanical potentiometer based on o-PP-2SMe that can be elongated by tensile force then change the conductance. The inset is the circuit diagram containing the potentiometer. c The switching factor (f) versus elongation distance for the reported mechanically sensitive molecular wires.