Fig. 3
From: Anti-fouling graphene-based membranes for effective water desalination
TEM characterisation of overlapping domains forming nanochannel in graphene film. a TEM image of overlapping domain boundary (darker contrast region) forming extended nanochannel in permeable graphene film; scale bar is 200 nm. SAED patterns (and associated line profiles in Supplementary Information) confirm the labeled regions as b single-layer graphene with rotation axis of 29.5°, c overlapped domains forming ~250 nm wide nanochannel, d turbostratic bilayer graphene with rotation axes of −7.6° and 25.1°. b–d Scale bars are 5 nm−1. The darker contrast region is confirmed as an overlapping mis-oriented graphene domain boundary, or nanochannel, due to the single layer to bilayer transition and shift in the respective rotation axes on either side of the feature. Inset shows representative diagram of an overlapping domain boundary with equivalent rotations of domains but narrow nanochannel width
