The SDC setup consists of an electrochemical cell, a force sensor, high-precision motors, and a syringe pump (Figure ). The electrochemical cell is made of an inert polymer material (PTFE) with the cell volume of 55 µL (excluding the tubing) and a tip opening of 1.0 mm, which is in contact with the substrate during the experiment. Counter (CE) and reference electrodes are screwed into the cell body and located inside the cell as close as possible to the tip edge to minimize the uncompensated resistance (Figure ). In the SI there are technical drawings of the SDC head and tip (Figure ). An electrolyte is dispensed or aspirated through the inlet from the side of the cell using a syringe pump Hamilton syringe pump 700 with a 500 µL syringe (Hamilton Company, Switzerland). Before starting electrochemical procedures at a new measurement point, the cell is washed with a new portion of electrolyte (375 µL) to avoid cross-contamination across the materials library due to the residues from the previous experiments. The excess electrolyte is poured into the waste and any electrolyte residues were removed from the PTFE tip. The position of the cell is controlled by high-precision linear stages and with stepper motors (OWIS, Germany). The tight sealing of the cell tip to the WE is controlled by a double bending force sensor KD45 (up to 2N force, ME-Systeme, Germany), and the force limit was set to 125 mN. All the above-mentioned components are housed in a MBraun UNIlab Pro glovebox filled with inert and dry argon gas (H2O and O2 content < 1.0 ppm; MBraun, Germany). The setup is connected to an Autolab PGSTAT302N potentiostat galvanostat (Metrohm Autolab, Switzerland) and a PC outside of the glovebox, which orchestrates each command during the experiment through the HELAO framework using a Python code .