Fig. 1 | Nature Communications

Fig. 1

From: Microscopic structure of the polymer-induced liquid precursor for calcium carbonate

Fig. 1

SEM and OM observations of the CaCO3 thin film formation process with 25 mg L−1 pAsp and 10 mM CaCl2. ad SEM images of the dried products. a Thin film formed on a glass slide at 5 h. Inset is a zoom-in image showing the ~60 nm-sized NPs in the film. b, c Calcite and vaterite platelets formed at 24 h, with insets showing 3D crystals also observed in the assay, respectively. d Rod-like CaCO3 crystals formed within a track etch membrane with 200 nm-sized pores. Inset shows the concave tip of the nanorods. eh Differential interference contrast optical microscopy (DICOM) in situ observation of the thin film formation process taken at 151, 248, 266, 335 min after reaction started, respectively. The thin film formed in e. A ~2 μm-moving particle is highlighted by the yellow circle, with its zoom-in image shown in the inset. A crystalline platelet nucleated within the film in f, and grew in g and h. The film near the growth front of the crystalline platelet started to dissolve in g. The dissolution extended outside to the film edge and the film was fully dissolved in h. The boundary of thin film is highlighted by yellow dashed line in eg. The calcite thin platelet is highlighted by yellow arrows in fh. The dissolution front of the film is highlighted by the magenta-dashed line in g. Scale bars: d and inset of e: 2 μm. Inset of a and d: 100 nm. Other images: 10 μm

Back to article page