Fig. 4. Real-time measurements of host-guest dynamics in SMJs at the device-liquid interface.

(A) I-t curves and (B) the corresponding histograms of a BPP34C10-SMJ device immersed in a 1 mM MV·2PF₆ Me₂SO solution at six different temperatures (273 to 323 K) with a sampling rate of 28.8 kSa/s. (C) I-t curves and (D) the corresponding histograms of the same set of devices immersed in a 1 mM MV·2Cl aqueous solution at six different temperatures with a sampling rate of 28.8 kSa/s. In both Me₂SO and aqueous environments, the electric currents passing through SMJs show bimodal distributions from 273 to 313 K. Binding constants (K_a), based on the Langmuir isotherm, can be derived from the current count distributions between two current levels, which change gradually at different temperatures. (E and F) Partial I-t curves (10 s) recorded in Me₂SO and aqueous solutions at 293 K.