Extended Data Fig. 4: Additional examples of our proton-transport measurements.
From: Proton transport through nanoscale corrugations in two-dimensional crystals

a,d,g, SECCM maps for 3 graphene devices. White dashed circles mark the 2-μm-diameter apertures in SiNx. b,e,h, AFM adhesion maps for the devices shown on the left panels. c,f,i, Height profiles for some wrinkles marked on the corresponding AFM maps (colour coded).