Figure 1: Optical and TEM characterizations of CVD h-BN layers.
From: Ultrathin high-temperature oxidation-resistant coatings of hexagonal boron nitride
(a) A photo of as-grown h-BN on Ni foils (size: ~3.5 × 3.5 cm2). (b–d) Optical image of bulk, few-layer (4~6) and double-layer h-BN films, respectively. Scale bars, 2 mm. (e–h) TEM images of double-, three-, four- and several-layered h-BN, respectively. Scale bar, 2 nm. (i) STEM–ADF image showing double-layered h-BN with AB stacking and its Fast Fourier Transform pattern (inset). Scale bar, 1 nm. (j) STEM–ADF image of single-layered h-BN after peeling off the bottom layer h-BN by electron beam. The brighter atoms are nitrogen and lighter ones are boron, as illustrated in the inset. Scale bar, 0.2 nm. (k) Electron energy loss spectrum of double-layered h-BN.
