Fig. 3: Experimental and estimated nanostructure of the SnO2:NiO system.
From: Bicontinuous oxide heteroepitaxy with enhanced photoconductivity
Plane-view TEM-EDS element mapping of nickel (blue) and tin (green) of a 2SnO2:1NiO, b SnO2:NiO, c 1SnO2:2NiO. d Compositional distribution of oxygen, nickel, and tin from the cross-sectional TEM image of the SnO2-NiO system with a composition ratio of 1:1 (bicontinuous) with the zone axis of [120]sapphire. e Distribution of angles at each interface of a–c. Inset: projection of rutile SnO2 and rock salt NiO along the out-of-plane direction. f–h. Structure factor S as a function of wavenumber k for the microstructures of 2SnO2:1NiO, SnO2:NiO, and 1SnO2:2NiO, respectively. The blue and orange curves were calculated based on their plane-view TEM images (Supplementary Fig. 8) and the 2D slice of the reconstructed 3D microstructures (shown in the insets, where the cyan color represents the morphology of the NiO phase; size: 256 × 256 × 256 nm).
