The results are shown in Figure , with symbols indicating the literature values, and the lines the predicted value for L using Equation . The legend indicates the electrolyte concentration and etched material. The figure shows that the linear relation between etching resolution (or extent) and the pulse time is captured by our model. Moreover, the predicted etching resolution given by Equation (lines) match the literature closely (within a factor ~2), in particular for the shortest pulse times. It is important to note that this implies that the resolution for a given pulse length is limited by the fast diffusion of protons in water-based electrolytes, in line with the sub-ns pulses required for confinement of ~100 nm as reported for electrochemical etching . This good agreement for the etching reactions suggests that the diffuse layer description and τC are good indicators to a priori predict the extent of electrochemical reactions in response to a potential pulse at a nearby pointelectrode.