Figure 1
From: Synthesis of 2D layered transition metal (Ni, Co) hydroxides via edge-on condensation
Crystal structure and morphology characterization of M-(OH)2, (M = Ni, Co) (A,B) Crystal structure of α-M(OH)2. (A) Side view; (B) Top view. (C) Optical image and SEM image (inset) of synthesized Ni(OH)2 flakes on SiO2/Si substrate. (D) AFM image of a Ni(OH)2 flake, the white dash line indicates the location where the thickness is measured. Inset: height profile along the white dash line. (E) Size distribution of 100 Ni(OH)2 flakes in a randomly chosen area. Inset: aspect ratio distribution, which is defined as the ratio of diameters measured along two perpendicular directions, indicating the shape of flakes. (F) Thickness distribution of 100 Ni(OH)2 flakes in a randomly chosen area. (G) Optical image of synthesized 2D Co(OH)2 flakes on SiO2/Si substrate, domain size reaches ~ 40 µm on one direction. Inset: SEM image of synthesized 2D Co(OH)2 on SiO2/Si substrate, showing the crystal domain is continuous. (H) AFM image of a Co(OH)2 flake, the white dash line indicates the location where the thickness is measured. Inset: height profile along the white dash line, showing the thickness of the flakes is 2.5 nm.
