Figure7

a The morphology evolution of the bulk red phosphorus materials during the high-temperature solvothermal reaction. b Low-magnification of TEM images of the holey phosphorus-based nanosheets. Reprinted with permission [86], Copyright 2016 Wiley. c HRTEM image of phosphorus-based nanosheets, showing the amorphous regions with some polycrystalline structure. d AFM image. e Synthetic protocol of the black phosphorus. f TEM image of the BP nanosheets. g HRTEM image corresponding to F. Lattice Image of a BP flake shows d spacing of the (020) plane of orthorhombic BP. h AFM image. Reprinted with permission [87], Copyright 2018 PNAS. i TEM images of the tellurium nanoflakes. j Corresponding HR-TEM image. k AFM image of typical tellurium nanoflake (top) and the corresponding height profile (bottom), scale bar is 1 µm. Reprinted with permission [88], Copyright 2018 American Chemical Society