Fig. 1: 3D atomic structures and chemical compositions of three core-shell nanoparticles with different morphologies.
From: Probing the atomically diffuse interfaces in Pd@Pt core-shell nanoparticles in three dimensions
a–f 3D surface morphology (a), core-shell structure (b), internal atomic slice (c), CN (d), bond length (e), and local BOO parameters (f) of PB, EPB and TO particles were identified from the coordinates determined by AET at the single-atom level. Inserts in a are the geometric Johnson solid models of three particles. For the structural order in f, BOO = 1 corresponds to a perfect fcc lattice. Scale bar, 2 nm. In a–c, green balls and yellow balls represent Pd and Pt atoms, respectively. In d, pink, pale pink, pale blue and blue colors represent atoms with CN ≤ 6, =7, =8 and ≥9, respectively. In e, continuous gradient colors from blue to red represent atoms with mean bond length from 2.4 Å to 3.1 Å. In f, continuous gradient colors from blue to white represent atoms with local BOO from 0.5 to 1, where BOO = 1 means ideal fcc structure.
