Figure 2 | Scientific Reports

Figure 2

From: Large-roll growth of 25-inch hexagonal BN monolayer film for self-release buffer layer of free-standing GaN wafer

Figure 2

(a) Photograph of large-size Cu foil wound in mainspring shape and supported by a quartz fork. The schematic wreath shows the way of winding and the length of Cu foil is over 25 inches. (b) Schematic of multi-prong quartz fork equipped with a magnetic manipulator. The cross cap is designed for fixing the wound Cu foil during the manipulation inside quartz tube. (c) Smoothly transferred h-BN monolayer film on 4″ Si wafer. (d) Raman spectra of a h-BN thin film. (e) AFM image of transferred triangular h-BN domains with its corresponding height profile. (f) TEM image of h-BN monolayer. The inset shows an hexagonal SAED pattern of the h-BN monolayer.

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