Fig. 1 in Nanostructure of biogenic versus abiogenic calcium carbonate crystals

Fig. 1. Synthetic aragonite crystals. Seven day old cluster of acicular aragonite crystals, overall (A) and close−up (B) views. Two day old cluster of acicular aragonite (C) with growth steps (D). No distinct nanograins are recognizable on crystal surface before and after (E–H) treatment with oxidizing solution. AFM (contact mode; buffered pH = 8, ammonium persulfate 1%, 10 min.): height−2D projection (E, G), and deflection (F, H) images of 1×1 µm (E, F) and 500×500 nm (G, H) crystal face. Grayscale bars (left) show z−scale (height) of 2D projection images.