Fig. 3
From: Insulator to metal transition in WO3 induced by electrolyte gating
Maximum sheet conductance as a function of film thickness. The electrolyte is PEG-NaF and the film has been charged at V G = 2.2 V and T = 304 K for 2 h. (Inset) Sketch of a step-like film, deposited using a shadow-mask that is moved in such a way that different portions of the films have different thicknesses
