Team develops method for neural net computing in water

https://phys.org/news/2022-09-team-method-neural-net.html

"aqueous solution  quinone molecules... two concentric ring electrodes with center disk electrode... two ring electrodes electrochemically lower and tune local pH around center disk by producing and trapping hydrogen ions... voltage applied causes electrochemical reaction to generate ionic current from disk into water... reaction rate can be sped up or down by tuning local pH... pH controls (gates) the disk's ionic current in the aqueous solution, creating an ionic counterpart of the electronic transistor"