Fig. 2: Illustration of MD-RuO₂-BN by 3D tomography reconstruction.

a Representative STEM-HAADF images at different rotation angles and reconstructed MD-RuO₂-BN at front view. b–d Corresponding front, top and right view of reconstructed MD-RuO₂-BN. e Representative ortho slices marked by black dash line in (d) (xy planes, perpendicular to the z axis at 18, 34, 50, 66 nm). f Extracted cubic sub volume from the labeled yellow dash line area in (b–d). g The right view of sub volume. h Representative ortho slices marked by black dash line in (g). i Volumes from segmentation by contrast corresponding to RuO₂ (blue) and interspace (black), respectively.