Figure 2
(a, b) 3D surface rendered images and cross-section images of the Ni particles before (a) and after (b) oxidation. In the rendered images, the surface was defined at 20% of the maximum value. The interval between the cross section is 52 nm. (c) 3D phase retrieval transfer function (PRTF) of the reconstruction of the Ni particles before and after oxidation. (d) Line profile of the electron density along the path indicated in (b) by the red dotted arrow. The black dashed line is the electron density of compact Ni1O1. |