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Layer-engineered large-area exfoliation of graphene

Layer-engineered large-area exfoliation of graphene
Layer-engineered exfoliation LEE of millimeter-size monolayer graphene. (A) Schematic illustration of our layer-engineered large-area graphene exfoliation technique. The inset shows the change in the number of layers of exfoliated graphene according to the relative binding energy between graphite and a metal stressor film. (B and C) Low- and high-magnification OM images of millimeter-size monolayer graphene obtained by the LEE method. (D and E) OM and AFM images of the cleaved natural graphite surface. The inset is a single trace of the AFM image showing the roughness of LEE-graphene, where the root mean square value is approximately 3.5 Å. (F to H) Histograms of the size and density of monolayer graphene obtained by the standard exfoliation and LEE methods for 25 samples each. Credit: Science Advances, doi: 10.1126/sciadv.abc6601

Large-scale manufacturing processes that aim to produce two-dimensional materials (2DMs) for industrial applications are based on a competition between quality and productivity. The

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