Fig. 6.

Large-area synthesis of phosphorous compounds. a Optical microscope images of few layer black phosphorus (FLBPs) exfoliated via the Ag- assisted methods, b the left is FLBPs exfoliated using the normal “scotch-tape” method and the right is BP exfoliated using the Au-assisted method, and c the total area of FLBP on 10 different samples. Adapted with permission from Ref. [21]. Copyright 2018, Royal Society of Chemistry Publishing Group. d Schematic of wafer-scale MBE grown 2D b-AsP achieved by evaporation of P₂ and As₂ followed by thermal annealing. Adapted with permission from the Ref. [22]. Copyright 2018 American Chemical Society