Fig. 2: Proton transport through monolayer GO.
From: Proton and molecular permeation through the basal plane of monolayer graphene oxide
a Examples of I-V characteristics for graphene and GO monolayers. Top inset, schematic of the devices used in the measurements. Bottom inset, AFM micrograph of one of our GO devices. Aperture size, 2 μm. Scale bar, 500 nm. Height scale bar, 200 nm. b Statistics of proton conductivity for graphene and GO monolayers. Each bar represents a different device. Our GO devices exhibited greater variability (factor of ~5) compared to pristine-graphene ones (factor of ~2). The difference is attributed to the uneven distribution of functional groups on the GO surface25, 26.
