Figure 4. Lateral communication of devices through soft electrolyte connections.

(a) Schematic of lateral communication and definition of the soft connection weight w_ji. (b) Spatial map of the output O_{i, (x=1, y=1)} of the device at coordinates (1, 1) when a pulse is applied at local input I_{j (x≠1, y≠1)} (amplitude of 100 mV, width of 50 ms) of devices at coordinates x≠1, y≠1. The distance d between the devices is 5 mm. (c–e) Spatial mapping of the connection weight w_ji (defined as O_i/O_{MAX, i}) for different electrolyte concentrations (100 mM, 1 mM, DI water).