Fig. 5: Growth of SC hBN on SC AS Cu film and demonstration of the single-atom-thick oxidation barrier.
From: Atomic sawtooth-like metal films for vdW-layered single-crystal growth
a, b SEM images of coherently aligned hBN grains and SC hBN film grown on SC AS Cu films. Inset in (a) shows a photograph of the centimeter-scaled sample. c Nine stacked SAED patterns obtained from nine different regions in 300 × 300 μm2 (I–IX in inset). The inset in (c) shows a low-magnification TEM image of transferred SC hBN on a TEM grid. d An HR-TEM image of the SC hBN film (inset: corresponding FFT image). Cyan- and navy-colored balls indicate B and N atoms, respectively. e, f Optical images and photographs of transferred PC and SC hBN films on Cu foils before and after oxidation. g Atomic percentages of oxygen in the PC and SC hBN-covered Cu foils before and after oxidation. h A schematic of the oxidation behavior on PC and SC hBN-covered Cu foils.
