Figure 5
Growth mechanism of h-BN. (a) Explanation for the texture growth (red arrow) of an AB nucleus. (b) Explanation for the lateral growth (green arrow) of an AB nanosheet. (c) Schematic showing the (110)AB and (110)AA planes for three BN layers [translucent blue planes indicate (110)AB or (110)AA]. The dashed circle indicates the localized growth of (110)AA due to its localized arrangement of atoms. (d) Schematic explaining the PI-2D growth model of h-BN platelets in HPHT sintering. `P' in big arrows indicates pressure. (e) Schematic explaining the SI-2D growth model of h-BN on a substrate. `X' indicates the impossibility of the secondary nucleation onto the nanosheet. |