The ability to control solution-based growth down to the nanoscale can revolutionize nanofabrication, by enabling the making of combined logical circuits, LEDs, photodetectors and many other (opto)electronic devices on the same platform with nanoscale resolution. Additionally, local deposition with dynamic EC-AFM can be used as an indirect means to probe EDL dynamics in general, which has a strong impact in any electrochemical process such as in batteries, or elecrocatalysis.